Trek Powerfly 9 LT (2019) first ride review

Alan Muldoon

  • Alan Muldoon
  • October 3, 2018

Beefed up the parts to deal with the beatings that e-bikes get

trek powerfly

Product Overview

Trek powerfly 9 lt.

  • Suspension, brakes and tyres are all on point. New battery layout is neat and easy to use.
  • Could have more generous reach measurements and shorter stems on all sizes.

Manufacturer:

Price as reviewed:.

Up hill or down, ebikes take an absolute beating, so the new Trek Powerfly 9 has a beefed up the parts package to handle the additional abuse.

>>> The best electric mountain bikes

Trek Powerfly 9 LT need to know

  • Integrated side-loading battery pack offers a sleek functional design
  • Trek’s ABP suspension pumps put 150mm travel, coupled with a 160mm Fox 36 fork
  • Bosch Performance CX motor and 500Wh battery packs on all models
  • Two new carbon version shares the same geometry and sizing as the alloy Powerfly LTs

trek powerfly

Forget torque, watts and even mismatched wheel sizes … integration is the real buzzword in ebike tech right now. And unless you go it alone with a custom motor like Rocky Mountain, something very few brands are prepared to risk, integration is currently about concealing the power-source.

trek powerfly

150mm travel offers adequate cushioning while crushing the descents

Now in its third generation the new Trek Powerfly LT 9 has one of the neatest battery concealing solutions we’ve seen to date. Not only is its drive-side loading internal battery a breeze to use, it means the down tube on the latest Powerfly LT doesn’t need to be disproportionally large to contain the battery, like say, the Shimano equipped BMC Trailfox AMP .

trek powerfly

Bosch PowerTube battery can be charged on or off the bike

Dubbed RIB, short for removable integrated battery, and with the protective cover positioned to one side the battery collects way less dirt too, so you’ll get way less grief for plugging the battery in next to the kettle for a quick charge. It even has a handy integrated carry handle for lugging it around. Best of all, RIB leaves plenty of space for a bottle cage, something that wasn’t possible with the battery position on the previous Powerfly LT.

trek powerfly

Purion display is Bosch’s most compact

In keeping with the pack-less riding experience, tabs under the top tube also let you attach a custom Wolf Tooth B-Rad storage strap so you can have a tube and CO2 canister with you at all times.

Other than the new downtube that houses the RIB battery, and the addition of the storage tabs under the top tube, the 2019 Powerfly LT 9 shares the same travel, geometry and attitude as the bike that won our e-bike test last year. Numbers that include a slack 66deg head angle (high setting) for increased steering stability and a generous size range that stretches from 15.5in all the way to 21.5in. Times are changing fast in the world of e-bikes though, and the reach numbers on the Trek look dated next to the Vitus E-Sommet that won our recent Enduro E-bike test.

The Powerfly LT 9 also has relatively long chain stays, 474mm to be precise. And while these aren’t really on trend and may even upset the balance of the bike on the smaller frame sizes, they are a godsend for taller riders on the 19.5in and 21.5in bikes as they help load the front end on flat corners to stop it lifting on the steepest climbs.

And boy did we ride some steep climbs on the launch of the Powerfly LT 9 in Bad Ragaz, Switzerland, terrain that an elite level XC racer on a sub 20lb hardtail would struggle to conquer. On the Powerfly LT 9 however we winched our way up huge mountains with the assistance of the Bosch CX motor driving the new SRAM NX Eagle 11-50t cassette. Stay seated and the Trek offers seamless power delivery, especially in E-MTB mode that automatically toggles between Turbo, Sport and Tour modes to match your effort. Out of the saddle however the Trek has more pedal induced bob than e-bikes like the Vitus and Canyon equipped with full size chainrings rather than a tiny 15t driver cog.

It was on the descents however that the Powerfly LT 9 showed its true colours. Planted and sure footed, it gives you the confidence to release your grip on the powerful 4-pistion Shimano XT brakes and push the reinforced 2.8in Bontrager XR4 tyres to their very limit. With gravity working its magic the new Trek Powerfly LT 9 is an absolute riot, but at £5,200 it’s an expensive way to get your kicks when the Vitus costs £3,599.99

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Trek Powerfly LT 9 first ride review

Trek's longer travel e-MTB has been updated

Sterling Lawrence / Trek

trek powerfly lt 9 plus 2019

Trek’s e-MTB Powerfly line-up is rather large, covering hardtails, women’s bikes, 130mm full suspension models and even one that looks great for commuting. But it’s the 150/160mm LT versions that interest us most — after all, bigger is better.

Trek is adding OCLV carbon models to the LT range of bikes this year, but the LT 9 looks to be one of the choice models in the range.

  • Trek add carbon and better integration with the new Powerfly range
  • Why you should care about e-bikes

The Trek Powerfly LT 9 is its top-level longer travel e-MTB

Trek powerfly lt 9 frame.

The frame features Trek's new side-loading integrated battery (RIB), which pops out of the driveside of the down tube. The company believes riders tend to lean their bike on the floor on the non-driveside when they take the battery out of the bike, so this makes life more simple.

The battery also has a flip-out handle to make it easier to carry around, plus removal of the battery is tool-free.

The frame’s geometry includes a long 475mm chainstay. This, Trek says, is to aid technical climbing, because the front wheel is less prone to lifting. At the front, the 19.5in size (effectively Large) comes with a 448mm reach in the bike’s low setting (I generally never bother with a high setting anyway).

This is fairly short for the size of the bike, but still gives a 1,251mm wheelbase, which is on the long side. The head angle is a slackish 65.5 degrees and the effective seat angle is also slack at 73 degrees. The bottom bracket sits at a height of 344mm.

Trek uses its ABP suspension linkage on the Powerfly LT. The rear pivot is concentric to the rear axle, and there’s a rocker link driving the shock, which sits fixed at its other end to the frame (as opposed to it being a full-floater design as found on some other Trek bikes).

There are some nice design touches on the frame. The Knock Block system prevents the bars spinning too much in a crash, removing the potential for the fork crown to hit the down tube — this allows Trek to keep the down tube straight from the head tube to the bottom bracket, which should be lighter and stiffer.

There are also little rubber bump stops on the downtube, but personally I find the Knock Block system a little annoying when turning the bars for storage.

There’s room for a bottle cage, and the internal cable routing is neat. There’s a rubberised chainstay protector on the drive side, and even a kickstand mount on the non-drive. Trek has also updated the Powerfly LT to be able to accept 2.8in tyres.

Trek Powerfly LT 9 kit

This is the highest tier alloy LT and the kit seems fair for the price of the bike.

Trek use the Bosch Performance CX motor, with a 500Wh PowerTube battery. Trek believes this is the motor with the best global backup and consistence in supply.

The fork is a 160mm Fox Performance 36 with the GRIP damper and the G2 Geometry 51mm offset. The chassis is the e-bike optimised version, which is a touch stiffer (and heavier) than the standard one.

The rear suspension is controlled by a RockShox Deluxe RT3 RE:aktiv shock. This effectively has a platform that keeps the shock stable through rider inputs, but opens on impacts – the idea is that it’s good for pedalling, but is also responsive to trail debris inputs.

Bontrager’s Powerline Comp wheels are alloy and wide. They’re also DH certified, but are built with e-MTBs in mind. On the Powerfly LT 9 they’re paired with Bontrager XR4 tyres in a 2.8in width.

There’s a SRAM GX shifter, which is the e-MTB version allowing only one shift at a time, with a GX Eagle mech. The cassette is the new NX Eagle version with an 11-50t range — this is the only Eagle cassette rated for e-MTBs, hence its use. There’s then an X1 alloy crank attached to the Bosch motor.

Shimano’s new four-pot XT brakes provide the stopping power, and Bontrager provides the remainder of the finishing kit.

Trek Powerfly LT 9 ride impressions

While the Bosch motor has a number of modes, I kept the bike largely in the e-MTB mode, which is a relatively recent addition to the software.

It’s a more intuitive, natural-feeling mode than the simple Eco/Tour/Boost modes, and gives finer control of the power to the rear wheel, as it adjusts its power output between Eco, Tour and Boost automatically, depending on gradient and cadence.

The bike, with its long chanstays and chunky 2.8in tyres does climb very well. On steep climbs there’s minimal wandering or lifting from the front wheel, while the back end seems to dig in to the dirt. When things get twistier uphill, there doesn’t seem to be any noticeable disadvantage to that long rear-end either.

I like Trek’s rear suspension, the system works well on a wide range of trails, and the RE:aktiv system does seem to do a fair job of keeping the back end pretty stable. While more noticeable on a bike such as the Fuel EX , on an e-MTB, keeping things controlled is still important.

On both high-frequency chatter and big hits, the suspension remains composed, meaning the tyres are better equipped to do their job.

Up front the Performance 36 did a solid job. The e-MTB-specific chassis is stiff, and the simple GRIP damper is pretty smooth – aided by the additional mass of the bike, which always seems to make suspension feel that little bit better.

The long back end is a constant across the size ranges, and so while the front end of the large isn’t super long, it’s still a relatively balanced-feeling bike. Riders looking at smaller frames might find that length bias shifts quite far rearward as the bikes get smaller.

The integrated battery keeps the centre of mass relatively low, which is beneficial for cornering, as the bottom bracket isn’t super slammed.

While the head angle is relatively slack, it was perhaps cornering where the Powerfly LT 9 was most likely to come unstuck, and that’s just because I found the XR4 tyre a little too rounded for my tastes — there’s not a super-aggressive shoulder tread, so the front wheel didn’t always have that much bite when leaned over.

Stop-and-go functionality from Shimano’s bigger XT brakes and SRAM’s Eagle group was as competent as ever too. I had no bite-point issues with the XT brakes, and the single shift GX Eagle shifter makes a lot of sense on an e-MTB.

Bontrager’s finishing kit is as good as it ever is, though I was happy to hear there’s been an update on the Line dropper post, which Trek says should be more durable and serviceable.

Trek Powerfly LT 9 ride early verdict

Improving integration of the battery makes the Powerfly LT 9 a really smart proposition. If you’re looking for a long enduro-focused e-MTB then you might be looking elsewhere, but this is a well-balanced bike that still feels comfortable when you let off the brakes and let gravity do its thing.

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trek powerfly lt 9 plus 2019

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E-MOUNTAINBIKE Magazine

Trek Powerfly 2019 Review – now with a carbon frame and fully-integrated battery

trek powerfly lt 9 plus 2019

The Trek Powerfly has become a true eMTB classic and has undergone several updates over the years. To keep up with the competition for the new season Trek equipped the latest version of their popular bike with an integrated battery and also introduced two fine carbon versions of the Powerfly LT. Here you’ll find all the details!

trek powerfly lt 9 plus 2019

A few years back Trek did a great job and gave the Powerfly a well thought-out and very well balanced geometry — which once again fully convinced us in our latest test . Sure there are more nimble bikes on the market but the new Powerfly strikes a great balance between uphill and downhill performance. For the new season Trek sticks to the proven geometry and rear-end of the previous version but ads a fully integrated, removable battery. On top of this the new model is available in two carbon versions and the spec has been optimised too. All Plus models are now rolling on sturdy, grippy Bontrager XR4 tires and all Powerfly LT models feature powerful four-piston brakes.

trek powerfly lt 9 plus 2019

Here are the highlights of the 2018 Powerfly line up at a glance:

– New fully integrated, removable battery – Two Powerfly LT carbon models – eMTB-specific fork on all Powerfly LT models – Four-piston brakes on all LT models – Bontrager XR4 tires on all Plus models – More colour options – SRAM Eagle groupset on some models – Robust RockShox Revelation on the Powerfly FS7 model – Updated Bontrager Line dropper – Powerfly Sport-Hardtail with lights and mudguards

 Trek RIB: probably the best fully-integrated and removable battery on the market

There is a vast choice of eMTBs with integrated battery on the market but only a few systems are thoroughly thought-out and refined down to the last detail. Some bikes come with super long batteries, on others the battery can’t be locked and can only be removed with the help of tools. And then there are systems made up of several parts (battery and cover). A battery can weigh up to 4 kg so when you remove it you have to be really careful not to drop it on the floor and break it.

trek powerfly lt 9 plus 2019

You can tell that the engineers at Trek gave the development of the RIB system (removable integrated battery) a lot of thought. The battery and the cover are one solid unit and the 500 Wh Bosch Powertube battery can be removed to the right hand-side. The system makes sense as most of us tend to lay their bike on its left side to avoid damage to the rear derailleur. Once you released the battery with the key it will pop out by a few centimetres; after depressing the big button you can remove the battery completely. An integrated handle makes the whole procedure easier – what an ingenious system! In addition the new integration allows you to place a bottle cage and a large drinking bottle in the main frame triangle.

trek powerfly lt 9 plus 2019

The new carbon frame allows for less weight and sleeker integration

trek powerfly lt 9 plus 2019

The new carbon frame proves just how much Trek believed in the geometry of the previous Powerfly LT model. The Americans could have revised the geometry for the latest update of the Powerfly but decided to stick to the familiar and very popular concept instead. Therefore the main advantages of the new carbon frame are a weight reduction of around 650 g and the significantly sleeker integration and appearance of the bike. Trek has equipped the top tube with a mounting option for a Wolftooth B-RAD system. The system allows you to quickly attach either an inner-tube or a tool to the bike and forget about carrying uncomfortable backpacks on short rides. In typical Trek style all Powerfly models come with a RE:aktiv rear-shock and ABP-link which keeps the suspension fully active even under braking. The geometry can be adjusted between two positions via a flip chip.

trek powerfly lt 9 plus 2019

Revised spec for the Trek Powerfly LT Alu

Even if you won’t buy one of the carbon versions with the Powerfly LT you’ll get quite a few performance upgrades in the coming season. In addition to the battery integration Trek has adapted the spec of the bikes. All Powerfly LT models feature an eBike-specific fork and powerful four-piston brakes. Trek also redesigned the Bontrager Line dropper seat post and used the new SRAM Eagle groupset. Compared to the cheaper Schwalbe Nobby Nic Performance tires the new Bontrager XR4 offer noticeably more grip and puncture protection.

trek powerfly lt 9 plus 2019

The Trek Powerfly LT 2018 on the Trail

We had the opportunity to test the Powerfly LT 9 at Trek’s launch-event on the gorgeous and varied trails in the Swiss Heidi-Land. Compared to the previous model the handling of the new version has changed very little. The better grip of the new tires might be the most noticeable change on the new version of the Powerfly. Like its predecessor the new Powerfly is a confident climber. The steep seat angle and rather long chainstays will get you at the top of steep climbs without a problem.

trek powerfly lt 9 plus 2019

On the downhill the Powerfly feels safe and balanced. It’s not the nimblest bike out there but it’s still very easy to ride. You won’t have to shift your body weight too much to get good grip on both wheels and the bike will always feel pleasantly predictable. But if you’re looking for a very lively super nimble bike the Powerfly might not be able to fully satisfy you. Quick direction changes and narrow sections require a very proactive riding style and quite a lot of strength.

trek powerfly lt 9 plus 2019

Our take on the new Trek Powerfly LT

Good stuff made better! Trek didn’t reinvent the wheel but the new Powerfly is a better version of the popular bike with many added improvements. The handling is very similar to the previous version. However you can clearly feel the performance upgrade of the tires. Unfortunately we didn’t get the chance to ride the new carbon version yet but even just the look of it has already convinced us. We’re not sure whether the carbon upgrade is worth the extra money but since our purchasing decisions are often driven by aesthetics and emotions we think that the new Powerfly Carbon will have certainly find many fans.

For more information head to the second page or to trekbikes.com

Inhaltsübersicht

  • Trek Powerfly 2018 Review
  • Trek Powerfly Models, Specs & Prices

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2019 Trek Powerfly 9.7 LT Plus E-Bike (discontinued)

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New 2019 Trek Powerfly – First Impressions.

The not-so-minor details.

2019 Trek Powerfly

Trek Bicycles

https://www.trekbikes.com/

4499 - 8499

Aesthetically clean. Bosch e-MTB mode for a natural feel. Considered spec.

Long chainstays.

The bike industry is in full e-swing, with new e-bikes releasing faster than iPhones or GoPros. While Trek might have been a little late to the party – with their first pedal assist mountain bike released just in 2016 – their new 2019 models, however, send a strong message. A lot of resources have been thrown behind their electric bike program, and it certainly will pay off, the new Powerfly is a very well considered package.

Hear our first impressions in the video below.

trek powerfly lt 9 plus 2019

What’s new?

  • Three models available with the addition of a new LT (long travel dual suspension model) with 160mm travel forks, 150mm travel in the rear.
  • A new OCLV carbon frame version of the Powerfly LT (ooooh yeah!).
  • All three models; hardtail, FS, LT use a new fully integrated Bosch battery inside the downtube.
  • New Bosch e-MTB mode equipped.
  • E-bike specific forks, more robust and tuned specifically.
  • Four-piston brakes on all LT models, and sintered brake pads across the range.
  • SRAM Eagle on higher models with the new steel Eagle NX cassette.
  • 2.8″ Bontrager XR4 tyres with reinforced sidewalls.
  • The integrated battery allows for water bottle and tool storage mounts.
  • New and improved Bontrager Line dropper post.
  • Same frame geometry as 2018 FS and hardtail models.

trek powerfly lt 9 plus 2019

Long travel Powerfly, where have you been all this time?

Previously only available from select overseas markets, the LT is finally coming Down Under. The Powerfly we reviewed last year was the FS model, with 130mm travel front and back. Certainly a great bike, but it didn’t take much for it to feel a little under-gunned when we took it to more technical trails or descents.

trek powerfly lt 9 plus 2019

It’s as if the venerable Trek Slash got struck by lightning, or fell into the cauldron of magic potion, this is a long travel bike with superpowers! The suspension felt like what we’d expect from Trek; balanced, consistent and well suited to the cause.

We spent a big day riding big mountains on the Powerfly LT 7 Plus – a non-Australian spec model – we will see two models of the LT, the LT 9 and carbon LT 9.7 pictured below.

It’s as if the venerable Trek Slash got struck by lightning, or fell into the cauldron of magic potion, this is a long travel bike with superpowers!

trek powerfly lt 9 plus 2019

A long travel model, however, is just the ticket to unlocking the Powefly’s true potential. We often don’t see the point in an e-MTB with less than 150mm of travel, with so much power at your disposal, lugging a larger bike around is no big deal. When you need a little more cushion for the push’n, a 160mm travel fork is just what you need to let the brakes off and push it.

Bosch’s new e-MTB mode.

While it’s simply just a mode setting, it makes the world of difference to how the bike rides. Selecting e-MTB mode on the display unit is like putting your camera into auto-mode, no, much better than that.

trek powerfly lt 9 plus 2019

The whole idea of the e-MTB mode is to naturalise the feeling of power delivery, so the response feels much more like a normal mountain bike under pedalling forces – it delivers a less aggressive power output if you’re pedalling slowly and gently, ramping up the juice when you’re hammering at the pedals.

The whole idea of e-MTB mode is to naturalise the feeling of power delivery, so the response feels much more like a normal mountain bike under pedalling forces

Read more about Bosch’s e-MTB mode and how it works here: Bosch e-MTB mode explained.

We tried riding in the three other modes – Eco, Tour, Turbo – and kept returning to e-MTB, it’s ideal.

Same geometry as 2018 models.

While it wasn’t music to our ears, news that the Powerfly’s frame geometry remained the same as last year, we do agree that Trek has made their decision after much consideration.

trek powerfly lt 9 plus 2019

When reviewing the Powerfly FS 7 last year, we had criticisms of the long chainstays making it harder to muscle what are already heavy bikes around on the trails. At 475mm it’s one of the longest out there, what does that mean?

See our review of the 2018 model Powerfly FS here.

Well, with so much bike behind you, lifting the front end up by the bars requires a whole lot of effort, and on the trails that translates to a bike that you become a bit of a passenger on, steering it through the trails rather than hopping or manualling around. We’ve ridden plenty of e-bikes with shorter stays and despite the inherent weight of a motorised bike, you can still ride them like a regular bike.

trek powerfly lt 9 plus 2019

On the flipside, a longer rear centre makes the Powerfly the best climbing e-bike we’ve ridden, hands down. Even with a tall 160mm fork, we took it up the nastiest inclines on the slipperiest surface with very little effort, the front end never lifted or wandered side to side. Their climbing manners are first rate.

Their climbing manners are first rate.

Climbs vs descents, stability vs agility, Toyota Landcruiser Troopy vs Suzuki Vitari? Everybody is different, we understand that. Though a middle-ground to build a more agile bike even at the sacrifice of climbing ability would be our preference.

E-Bike spec in the bag.

With the component manufactures sorting out their end of the deal and producing more parts that meet the demands of e-bikes, Trek has more to choose from. The 2019 range will have more four-piston brakes specced, tougher tyres, steel Eagle NX 12-speed cassettes and more robust forks that are tuned specifically for the heavier bikes.

trek powerfly lt 9 plus 2019

Final thoughts.

While our opinions on the frame geometry remain, we appreciate that we might approach e-bikes different to others. The new bikes are very dialled, the new integrated battery will fool anyone from afar thinking it’s a regular bike, it is so aesthetically clean. And the addition of Bosch’s e-MTB mode is really clever, the bike rides very naturally.

We’re hoping to score a ride on the Powerfly 9.7 LT, to see how the OCLV carbon frame changes things, so keep your eyes out for more.

trek powerfly lt 9 plus 2019

For more on the Australian range of Powerfly models head to Trek’s site here. Yiew, Powerfly!

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Trek Powerfly 9.7 LT Plus

  • AUS $ NZD $ USD $ CAD $ GBP £ EUR €

Colour / Dnister Black/Rage Red

Size / 15.5, 17.5, 18.5, 19.5, 21.5

Weight / 51 lb 1.7 oz (23,180 g)

At a glance

ABP (Active Braking Pivot), Knock Block steerer stop, Integrated frame protection and motor guard, Internal cable routing

Where To Buy

Trek Logo

Specifications

  • Frame OCLV Mountain Carbon main frame, alloy stays
  • Fork RockShox Yari RL, DebonAir, Motion Control RL damper, boost 110, 51mm offset, 160mm
  • Shock RockShox Deluxe RL, 205mm x 57.5mm
  • Motor Bosch Performance CX
  • Battery Bosch PowerTube, 500 Wh
  • Hubs Rapid Drive, boost 110mm front, boost 148mm rear
  • Wheels Bontrager Line Comp 40, tubeless ready, tubeless strips included, valves sold separately
  • Wheel Size 27.5"
  • Spokes DT Swiss Nailhead 14/15G spokes with Alpina alloy locking nipples
  • Tires Bontrager XR4 Team Issue, Inner Strength sidewalls, 120 tpi, aramid bead, 27.5 x 2.80
  • Chain 474mm, N/A, 15 tooth with chainguard, SRAM NX Eagle, 12-speed
  • Crank Race Face Aeffect
  • Bottom Bracket 6mm drop
  • Rear Derailleur SRAM NX Eagle
  • Shifters SRAM NX Eagle single-click, 12-speed
  • Brakeset Shimano MT520 4-piston hydraulic disc, Shimano MT520
  • Handlebar Bontrager Rhythm Comp, 31.8mm diameter, 15mm rise, 780mm width
  • Saddle Bontrager Arvada
  • Seatpost Bontrager dropper post, internal routing, 31.6mm, Standard single bolt, 31.6mm, Standard single bolt
  • Stem Bontrager Rhythm Comp, Knock Block, 31.8mm clamp, 0 degree
  • Grips Bontrager XR Trail Comp, nylon lock-on
  • Headset Knock Block Integrated, sealed cartridge bearing

Q: How much is a 2019 Trek Powerfly 9.7 LT Plus?

A 2019 Trek Powerfly 9.7 LT Plus is typically priced around $5,999 USD when new. Be sure to shop around for the best price, and also look to the used market for a great deal.

Q: Where to buy a 2019 Trek Powerfly 9.7 LT Plus?

The 2019 Trek Powerfly 9.7 LT Plus may be purchased directly from Trek .

Q: How much does a 2019 Trek Powerfly 9.7 LT Plus weigh?

A 2019 Trek Powerfly 9.7 LT Plus weights 51 lb 1.7 oz (23,180 g).

Q: What size wheels does the 2019 Trek Powerfly 9.7 LT Plus have?

The 2019 Trek Powerfly 9.7 LT Plus has 27.5" wheels.

Q: What size 2019 Trek Powerfly 9.7 LT Plus should I get?

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Trek Powerfly LT 9.7 Plus 2019

Trek Powerfly LT 9.7 Plus 2019

About the Trek Powerfly LT 9.7 Plus 2019

The Trek Powerfly LT 9.7 Plus 2019 is a Full suspension Enduro Mountain Bike with a carbon frame. Equipped with a SRAM NX Eagle drivetrain of 12 gears (1x12). Its features include internal routing, dropper seatpost, and boost 110 . The bike weighs approximately 23,18 kg.

Internal routing

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trek powerfly lt 9 plus 2019

Trek Powerfly 7 LT Review

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Trek Powerfly 7 Lt Electric Bike Review

  • Trek Reviews
  • All Mountain Electric Mountain Bike Reviews
  • Electric Mountain Bike Reviews
  • Full Suspension Electric Bike Reviews
  • Mid-Drive Electric Bike Reviews
  • A stealthy, long travel, all-mountain electric bike with longer wheel base and adjustable seat stay hardware to optimize geometry for climbing and descending, proprietary "Active Braking Pivot" rear suspension reduces skipping, Knock Block headset and Hartzell Hug impact-absorbing downtube bumpers allow for straight downtube
  • Trek-invented Boost hub spacing improves spoke bracing angle and support for larger plus sized tires, quick release thru axles are sturdy and easy to work with, direct-link rear suspension stiffens the chain stays and bottom bracket without compromising performance thanks to the DeonAir rear shock
  • Beautiful battery integration, Bosch PowerTube 500 disappears into the frame, keeps weight low and center, provides space for a bottle cage mount and accessories above, sturdy locking core from ABUS with keyed-alike code, battery has a built-in handle for secure removal and transport
  • Bosch Purion display does not have an active Micro-USB port, the PowerTube 500 is heavier than the older PowerPack design, longer wheel base isn't as nimble and the motor integration is flat vs. angled up (unless you get the carbon model), the motor is heavier than the competition, produces more noise, introduces some drag when unpowered

Video Review

Introduction

Body position:, suggested use:, electric bike class:, learn more about ebike classes, availability:, model year:, bicycle details, total weight:, battery weight:, motor weight:, frame material:, frame sizes:, geometry measurements:, frame types:, frame colors:, frame fork details:, frame rear details:, attachment points:, gearing details:, shifter details:, brake details:, seat post length:, seat post diameter:, tire brand:, wheel sizes:, tire details:, tube details:, accessories:, electronic details, motor brand:, motor type:, learn more about ebike motors, motor nominal output:, motor peak output:, motor torque:, battery voltage:, battery amp hours:, battery watt hours:, battery chemistry:, charge time:, estimated min range:, estimated max range:, display type:, display accessories:, drive mode:, written review.

EBR charges a service fee to manufacturers to produce ebike reviews and videos, this began in 2018. It’s the same flat fee for each bike, and it helps us to keep the site going while limiting ad clutter. We appreciate the opportunity to serve you with our opinions and data but respect your right to know that we receive compensation :)

The Trek Powerfly electric mountain bike models have been completely redesigned and updated for 2019, and EBR was invited to attend a launch event at Mammoth Mountain resort in California to check them out for this review. I brought my friend Brandy, who is a beginner mountain biker, and we spent the day hearing about updates and then going for rides (up and down the lower sections of the mountain). Mammoth sits at roughly 11,000 feet (3,352 meters) elevation above sea level, and there was a small forest fire burning nearby during our visit… so it was awesome to have electric assist, to make it easier to breathe. Summertime is beautiful in the Inyo National Forest, Mammoth is a lava dome volcano and the terrain is really unique and varied (featuring soft volcanic pumice in some areas and steep jagged rock in others). We got to interview one of the Mammoth staff and learn about the resort’s rich history of innovation… and there was a little celebration happening because the mountain has become one of the first in the US to officially allow Class 1 electric bicycles on national forest land. Anyway, it was pretty warm in the afternoons and I’m certain that we couldn’t have ridden as far or stayed as cool and comfortable on traditional mountain bikes. It certainly wouldn’t have been as much fun for the two of us to ride at a similar pace together. I’d consider myself an intermediate mountain biker, but I have an injured left knee and have become a big fan of e-bikes as a way to keep up with advanced riders and just go further.

All of the Powerfly electric bike models from from Trek share the same Bosch PowerTube 500 battery and Performance Line CX motor. They range from affordable hardtail models called the Powerfly 5 and Powerfly 5 Women’s (which has a slightly lower, sloped top tube), up to the Powerfly 5 FS (full suspension), the Powerfly 7 FS, the Powerfly 7 LT (long travel) which was the focus of this review, and the Powerfly 9.7 LT (a carbon fiber long travel version). If I were purchasing one of these models for myself, I’d probably go with the 7 FS because I don’t need the longer travel suspension for aggressive downhill riding and prefer the all-black color scheme on that model, which hides the black motor casing. If money were no object, the Powerfly 9.7 LT would be nice because Trek was able to tilt the motor a bit for a nicer looking integration and carbon fiber tends to reduce jitter and weigh a bit less. The 7 LT came in around 52.3 lbs (23.7 kg) which is about average for bigger suspension, thru axles, plus sized tires, and the PowerTube 500 battery (which weighs more than the older external PowerPack plastic batteries). In recent years, I discovered that Trek created the wider Boost axle and bottom bracket standard. This allows for a stronger spoke bracing angle which supports plus sized tires (2.6″ to 3.0″ width). You can see that on these bikes, and I was told that the Q Factor is 190 mm and that the frame was made a bit long to help keep the front wheel down on steep descents. Despite this, I managed to lift the front wheel on a couple of occasions during our ride test. Trek has another innovation in store for people who are willing to spend some time unscrewing bolts… the seat stays can be made slightly longer or shorter by flipping this washer called a Mino Link which changes the fork angle by about one percent. I haven’t seen this on any other electric mountain bikes. Same goes for the Lock Block headset, designed to stop the crown from bashing into the downtube in the event of a crash. Other frames utilize curved downtubes that aren’t as stiff. The rear suspension design uses a rocker link and vertical shock position to keep as much weight directly below the rider (at the center of the frame) as possible. Older Trek models had a floating pivot design but I was told that they have moved towards direct frame mount in an effort to stiffen the chain stays and bottom bracket. The rear wheel mounts to a pivot point and benefits from an Active Braking Pivot (ABP) design meant to isolate suspension movement from braking, to keep your rear wheel in contact with the ground and reduce stiffening and brake squat. Lots of fancy proprietary engineering happening here. As a more casual rider, I was drawn to the clean internally routed cables, tight motor casing with clever molded chain guide and alloy skid plate (with bottle opener), double-sided slap guard and chain suck protector wedge, and powerful 203 mm hydraulic disc brakes with quad piston calipers. As someone who frequently rides with just one hand on the bar (because I’m filming), it’s nice to have good brakes. For whatever reason, the brakes were squeaking a bit during my rides, and that could be due to some hand oils on the rotors from transport, assembly, and demos. It was great to work with the Trek team to be fit to the frame properly and then have the suspension sagged to my body weight. Both air shocks have black anodized coatings to minimize stiction, offer rebound, and compression adjust… they felt great. With five frame sizes available for each of the Powerfly models coming to the US, and a vast network of dealers, you’ll be able to find a great fit and get set up properly like we were.

Driving the bike is a planetary geared mid-motor that’s rated 250 watts nominal and 600 watts peak. Depending on the market you’re in, the top speed may be 32 km/h (20 mph) or 25 km/h (15.5 mph) to comply with local regulations. It’s a Class 1 product, meaning that it utilizes pedal assist only and is allowed on the widest number of trails (including at Mammoth). With a peak torque rating of 75 Newton meters, it’s one of the most powerful centerdrive electric bike drive systems on the market, but it’s also one of the loudest. If you’re riding on gravel trails or through the woods, the high pitched motor sound is mostly masked by tire contact. What’s so impressive about this system is that it responds to rear wheel speed, pedal cadence, and pedal torque over 1,000 times per second and incorporates software driven shift detection. Bosch is well known for their motor controller system and the Performance Line CX motor offers an eMTB mode that was developed in tandem with professional mountain bike riders. The motor itself weighs a bit more than some of the competition at roughly 8.8 lbs. There’s definitely room for improvement here, but Bosch has earned a reputation for quality and reliability. They were one of the first big companies to enter the US with brands like Haibike and have faithfully served the North American market longer than Brose, Shimano, Yamaha, and most others. What you trade in millimeters and grams is made back through reliability and leading performance. Perhaps my favorite part about this motor, and a feature that is especially relevant to electric mountain biking applications, is the higher pedal RPM support. Basically, you can pedal fast in a high gear and the motor will continue supporting you at up to 120 pedal strokes per minute. I tried to demonstrate this in the video review above… Some other motor systems cut out at 100, 110, or begin to fade near 120. This motor can handle steep climbs but also supports faster spinning on cross country sections. It empowers you as a rider vs. forcing you to adapt to electric assist. I also appreciate the walk mode feature that was working on the latest batch of Powerfly ebikes. This is a feature that most earlier (pre-2018) Trek models had disabled, but it comes in very handy for those moments when the terrain is too difficult to ascend or you’ve got a flat. The 11-speed Shimano Deore XT drivetrain empowers the Bosch mid-drive to climb and can easily pedal the bike beyond the top assisted speed. You’ve got an 11-46 tooth cassette and a proprietary 15-tooth (38 tooth equivalent) chainring to work with. The motor utilizes a reduction gearing system to spin the 15 tooth cog 2.5 times per single crank revolution and this causes a bit of mechanical drag that eats into efficiency when the bike is unpowered or pedaled beyond the top assisted speed. Some benefits might be faster starts and stops along with excellent chain retention… but the chain is also positioned very near the chain stay, so there’s more contact happening as you ride over bumps. Thankfully, the Deore XT derailleur does come with a one-way clutch system, a little grey lever that can be clicked into the up position to tighten the derailleur spring and reduce bounce. Position it in the forward position for easier wheel maintenance.

One of the most exciting new design features that Trek has introduced for their 2019 mountain models is the Bosch PowerTube 500 battery integration. In the past, Trek has done a great job of matching and smoothing the external plastic PowerPack battery… insetting the packs and even using plastic covers for protection and aesthetic enhancement, but it still stuck up above the downtube and stood out. It limited space for adding bottle cage bosses and other accessories in the main triangle of the frame. The PowerTube, by contrast, is completely hidden inside the downtube and it stays out of the way completely. The battery bay is wide open when the pack is removed and this actually makes it easier for shops to adjust shifter, brake, electrical, and seat post dropper cables. The battery pack is encased in an aluminum alloy shell and has a second layer of alloy protective covering screwed onto the right side, painted to match the downtube design of each specific model. We were told that the shield does not add to the structural integrity of the frame (and for the carbon fiber 9.7 model it is still aluminum alloy) so it definitely adds some weight. In addition to the shield, there’s also a plastic top cap with flip-up handle. This is a welcome feature because it makes removing and transporting the $900+ battery much easier and safer. You first have to unlock the pack from the left side of the frame and then it pops out about halfway before you can press a lever on top (where the handle is) and pull it the rest of the way out. This two-step approach is also very nice for safety, but it only works on the way out… When you’re mounting the pack, you actually have to insert the key and twist it on the left side of the frame while trying to balance and push the battery pack from the right. I wish the halfway step did not require a key so that the process of balancing everything could be less precarious. I asked about this and was told that Trek wanted to make the locking mechanism secure and reduce rattling, so this is why the key must be turned. Anyway, I do appreciate the thought that went into putting the battery door on the left side of the frame vs. the bottom (where the pack could drop out easier on removal due to gravity), the top (where the pack could collide with the top tube from below), or the right (which would encourage riders to lay their bikes down on the more delicate drivetrain side). But still, the key port is on the left, so if you do lay the bike down it could be a challenge to reach under and twist. The charging port is also on the left side of the frame, directly in the path of the left crank arm. The Bosch plug interface is a wider proprietary design that seems sturdy, but it’s still worth being careful not to snag. There’s a little plastic door protecting the charging port and this is a nice upgrade from the stand-alone rubber plugs I see on some other models that could get lost when they don’t have leashes. I do recommend being delicate and thoughtful when laying the bike down on the left side because the larger 203 mm disc brake rotors could get bent easily (especially in off-road environments with sticks and rocks strewn about). Amazingly, the left chain stay has a 20 mm threaded tab for adding a kickstand! So, if you’re buying an all mountain electric bike and want to ride it around with a jittering stand, you can do that! Or, you could ride it around an urban environment and take on curbs, grassy hills, and pretty much anything else, and still stand it up straight in your garage and at the bike rack. Nice one, Trek :D Just like the older Powerpack batteries, the new PowerTube can be charged on or off the frame, and Bosch continues to lead with their compact, lightweight, faster 4-amp charger. I’d definitely remove the ~7.4 lb battery before lifting the bike for service or mounting it to my car rack. The battery has a little LED indicator on the base (where you plug it in) that communicates a rough estimate of fill level. To maximize lifespan, keep the battery charged over 20% as frequently as possible and avoid extreme heat and cold. The PowerTube is longer than the older PowerPack, it’s less universal because of the proprietary covering that each company is making for themselves, and it’s less available to travelers (or between bikes in the same family due to the covers). Sure, you could borrow a different colored battery for a long trip if you and a friend both have Trek ebikes, but imagine trying to stick this thing into a backpack or pannier bag. It’s just not as compact or convenient as the PowerPack… So I kind of miss that from the older Powerfly models, which still looked great. The 36 volt 13.4 amp hour size is about average for this generation of ebikes, and the lithium-ion cells are above average in terms of quality and warranty support. I really like and trust Bosch, but compared to the custom 36 volt 17.5 amp hour packs for some Brose powered ebikes that actually weigh less, it leaves something to be desired.

Activating the electric systems on this bike is fairly straightforward. You charge and mount the battery then press the power button on the top edge of the little display panel, which is mounted within reach of the left grip. This is the Bosch Purion display panel , one of the nicer compact offerings on the market right now. It cannot be swiveled to reduce glare easily, is not removable for protection, does not show as many menus (missing Clock, Max Speed, Average Speed, Trip Time, Shift Recommendation), and does not have an active Micro-USB charging port like the larger Bosch Intuvia display . However, it keeps the handlebars clean and may not get damaged as easily in the event of a tip. This is a very popular display panel for electric mountain bikes, which often strive to go “below the radar” and limit fancy accessories that could get broken or attract unwanted attention. I have grown to accept it but have a few tips for use… the + and – button pads that raise or lower power for assistance click in at an angle towards the right. They are attached near the left edge of the control pad and pivot in towards the LCD. The right edge is their sweet spot, sometimes even the middle can be difficult to click in or just inconsistent. The screen itself glows faintly in white at all times, which shouldn’t draw much power, and is handy when it’s early morning or later at night and you need to read it. Once you get the hang of things, you really don’t have to look down at all because you can notice the clicks of the button pad and feel the boost in power. Furthermore, if you set the drive mode to eMTB (which is third up from the bottom: Eco, Tour, eMTB, Turbo), you might not want to click at all because the mode is so dynamic and good. Holding the + button will turn a lights icon on and off but since the Powerfly models don’t come with lights (at least not in the USA), this doesn’t really do anything. Some dealers may be able to wire in lights for you at an extra charge, and this could be really cool for people who enjoy moonlight rides and want to take advantage of the high capacity battery onboard. Holding the – button will cycle through trip distance, odometer, assist level, and range. This range section is dynamic, so you can see the bike calculate how far it thinks you can go based on the last mile of riding, your current state of charge, and the chosen level of assist. On the lower edge of the control pad, mirroring the power button, is a walk-mode button. When you’re in any of the four levels of assist (not Off) press walk-mode once and then hold the + button to have the motor slowly assist you when walking the bike, as mentioned earlier.

This review video and writeup was longer than normal because I wanted to provide some guidance for the entire lineup. Trek is a leader in the cycling space, one of the top three manufacturers globally (Trek, Giant, Specialized), and their electric bicycles are some of my favorites. Trek didn’t pay me to say that and I didn’t get paid for this review… but they did provide a really cool experience for my friend and me. The past six years of my life have been dedicated to electric bikes, ever since I got a knee injury and wanted to keep commuting to work daily. My preference is full suspension mountain bikes because I also have neck and back injuries… and I love the new plus sized tires that provide increased float, traction, comfort, and reduce deflection on big rocks. It’s neat to see a few different levels of bikes, a women’s specific model with slightly lower standover height, and the carbon frame option. I was riding the 17.5″ frame and probably would have been better off on the 18.5″ because I’ve got such long legs. The Trek rep named Ross told me that they were targeting more options for the mainstream “middle of the bell curve” and that makes a lot of sense. It’s nice to have a dropper post, fully adjustable suspension, and a frame that is well-balanced front to back. the drive systems are positioned well and perform incredibly, but do produce some extra noise compared to some competitors. For those who are new to the 650B tire size utilized here, it provides the rolling momentum and lower attack angle of 29ers with increased width for traction. It makes perfect sense for an electric bike because the added weight and drag of the tires are offset by the highly efficient motor. The Bontrager tires that come with this model have reinforced sidewalls to handle lower pressure (increased tire flex) and the tires and rims come tubeless-ready for easy conversion. You’ll get less pinch flats, save ~200 grams total, and get fewer flats because of the self-sealing nature of tubeless sealant. As always, I welcome questions and feedback in the comments below, I’ll do my best to answer, and you can connect directly with other owners and enthusiasts in the Trek electric bike forums .

  • The Powerfly line of electric bikes from Trek all share the same battery and motor integration, this keeps costs lower and makes fixes easier, I was amazed that all six of the models being introduced to the North American market for 2019 (Powerfly 5, Powerfly 5 Women’s, Powerfly 7 FS, Powerfly 7 LT, Powerfly 9.7 LT Carbon Fiber) come in five frame sizes! This ensures optimal fit
  • There are actually two “medium” frame sizes to choose from, I rode the 17.5″ but would have preferred the 18.5″ which is slightly larger (since I have longer legs), Trek really focused on the “fat part of the bell curve” with their sizes to serve most common use cases well by having two mediums
  • Trek only sells through dealers at this point, and this strategy allows them to provide the best quality control, assembly, and fitting… but they are also one of the three largest bicycle brands in the world, so their prices aren’t as high as some competitors, it’s the best of both worlds
  • The motor is protected from rock and log strikes by a long alloy skid plate, it’s vented to improve cooling and the large vent hole in the center is shaped into a bottle opener… which is fun, I really appreciate the plastic casing design on the right side of the motor as well, this doubles as a chain protector and guide, it’s even designed to help clear mud and prevent chain suck
  • Excellent use of slap guards, there’s a long rubber strip on the top and bottom portions of the right chain stay, this will keep the paint job in tact and reduce noise on rough sections of trail
  • The smaller Bosch chainring makes chain slap more common than with a standard sized chainring but the Shimano Deore XT derailleur minimizes this when you click the one-way clutch into the up position, tightening the springs to reduce chain bounce
  • Overall nice aesthetic, the paint job isn’t super busy and Trek has matched the black rims, seat post dropper, and suspension elements (including black stanchions) to the black paint accents… this is the case on all 2019 Powerfly models, I like the 7 FS best because the black motor blends with the black frame color
  • Sturdy thru-axles, Boost hub spacing, thicker 35 mm fork stanchions, a high-volume rear suspension, and frame-mounted rear suspension interface (compared to their older floating pivot) increase frame stiffness, handling, and efficiency of power transfer
  • Air suspension tends to be lighter, more adjustable, and these RockShox components have hard anodized stanchions to reduce stiction and perform better on smaller bumps, I appreciate the the proprietary rear pivot ABP design
  • The Bontrager XR4 tires are designed to be lightweight but still have reinforced sidewalls to be durable when running at low tire pressure if you decide to go tubeless, they ship tubeless ready with strips and valves included for easy conversion and that’s what the Trek reps recommended to me… I was told that plus sized tubes can run 100 grams a piece and tend to go flat more easily when running with low pressure, so it’s decent weight savings but most importantly helps you reduce pinch flats and reduce maintenance effort
  • The headset uses Knock Block to prevent oversteer and subsequent frame damage, even if you really crash hard and break the chips inside the Knock Block, the downtube has rubberized strike points for further protection
  • Internally routed cables look great and stay out of the way but are still easy to service because of the wide opening for the PowerTube battery pack
  • Internally mounted battery pack keeps weight low and centered on the frame, it stays protected inside an alloy (or carbon fiber) tubing structure with an alloy cover, Trek really thought things through and chose a right-side mount because it’s best to lay bikes down on their left side (to protect the drivetrain)
  • Another benefit to the PowerTube battery, with attached plate and handle here, is that you don’t have to worry about someone stealing/tampering with a non-locking plastic cover when the bike is at a rack, and there are just fewer parts to keep track of when you do remove the pack from the bike
  • One of the trade-offs with the Bosch PowerTube battery is that it does not come stock with a handle… Trek designed their own interface with two-step click (so it won’t flop out when you unlock it) and added a handle for secure and safe transport
  • Plenty of space below the top tube, in front of the seat tube, and on top of the downtube to mount accessories… Trek even included bottle cage bosses for all of the Powerfly models!
  • Excellent drivetrain, you get an extra wide 11-46 tooth cassette to handle All Mountain terrain… everything from climbing to descending with speed, I appreciate the durability and weight savings of a 1x drivetrain like this
  • Extra large 203 mm disc brake rotors with larger quad-piston calipers provide stopping leverage and improved cooling for those fast, long descents… sometimes I’ll see 203 front with 180 mm rear but considering the semi-downhill performance of this suspension setup and heavier ebike build (52.3 lbs total here) it’s a great hardware upgrade
  • Very nice 130 mm seat post dropper with internal cable routing, thicker 31.6 mm seat post sizing makes this part easy to swap out or upgrade
  • Trek really dialed in their rear suspension for the new line of Powerfly e-bikes, the Active Braking Pivot (ABP) rear link reduces lockup and skipping so the rear wheel can stay on the ground, the Rocker Link piece positions component mass (including the rear shock) directly below the rider for better handling, they optimized the leverage rate between the rear wheel and rear shock to provide excellent mid-stroke control for less bobbing, more stable cornering, and and better acceleration
  • Both seat stays have this “flip chip” adjustable washer called the Mino Link that allows you to change the frame geometry on the fly, when the link is extending the stays it provides quick performance for cross country quick-handling use but when you shorten the stays it slackens the head tube angle by about 1° for stable downhill riding, positioning the suspension fork to take hits more directly
  • The Bosch CX motor controller is extremely smart and consistent, it measures rear wheel speed, pedal cadence, and pedal torque over 1,000 per second while also listening for pressure changes from shifting and then easing off, this protects the drivetrain a bit from mashing
  • ABUS makes the locking core that secures the battery cover, it comes with a code for ordering additional keys or getting keyed-alike accessories such as folding locks
  • I was delighted to discover that the bike has provisions for mounting a kickstand on the left chain stay! I think it’s a 20 mm spacing with two bolts and Trek / Bontrager hardware would be compatible
  • The bike comes stock with the faster 4-amp Bosch charger that lets you spend more time riding and less time waiting, the Trek rep Travis told me that electric mountain riders tend to drain batteries faster because of all the climbing, etc. so it’s nice that the charger is also lightweight at ~1.7 lbs and very compact, the Bosch charger is one of my favorites
  • The display is compact, it won’t get damaged as easily in the event of a crash but is still fairly readable with large readouts, for such a stealthy electric bike with integrated battery, the Purion display matches the understated look
  • Trek is now enabling walk mode on their electric bikes! This is especially useful if you encounter a technical bit of trail that you aren’t comfortable riding or maybe you get a flat tire, considering that the bike weighs ~52 lbs, it’s nice to get help moving it
  • I really like the eMTB drive mode, it was designed by Bosch with help from professional mountain bikers who dialed it in so the power isn’t overwhelming but also doesn’t let you down… it’s a great “all around” assist level to use so you can focus on shifting gears, it’s especially nice to have with the Bosch Purion display panel because I have found that the buttons aren’t as consistent (press near the right edge, near the LCD display, because they pivot in vs. going straight down)
  • Another feature of the Bosch Performance Line motors that I really appreciate is how they can support higher pedal rates without fading out, you can reach 120 RPM (pedal strokes per minute) and the motor is still there for you, this means you don’t have to shift gears as frequently if you prefer to spin instead
  • The quick release wheels and removable battery pack make this an easy bike to lift, transport, service on the trail, and park securely
  • Trek invented Boost technology for wider, stiffer axles to support 29er wheels and now the 27.5″ plus sized tire setup with a wider bracing angle on the spokes, I love the knock-block stem, headset top cap, spacers and frame chip and rubber hartzell hug impact-absorbing downtube bumper backup protection system (to prevent oversteer into the straight shot downtube which could damage the fork and frame), by making the downtube straight they reduced the strength to weight ratio and improved stiffness
  • Excellent two year warranty covers everything on the bike, including the motor, battery and display system, and with a vast network of dealers out there, it requires less effort to get help
  • I appreciate the aesthetic that some ebike companies have been able to achieve by tilting the Bosch CX motor up and melding it into the frame, you can see this with the BULLS SIX50 EVO AM 4 and even Trek’s own Powerfly 9.7 LT Carbon which both use the Bosch PowerTube 500
  • As nice as the battery cover looks, and as useful as the handle mechanism at the top of the pack is, this battery pack weighs significantly more than the same-capacity PowerPack 500 which mounted on top of the downtube (as seen with this 2017 Trek Powerfly 8 FS model), the benefits of the PowerTube are lower weight position, nicer look, ability to mount bottle cage and other accessories in main triangle
  • The Bosch Performance Line motors are heavier and larger than the Brose S, Shimano E8000, and Yamaha PW-X while also having a wider minimum Q-Factor, but that’s less of an issue on this Boost frame because it’s setup with a 190 mm Q-Factor to reduce shoe strikes on the stays
  • The motor produces more noise than some competing products and uses a reduction gearing system to spin the proprietary chainring 2.5x for each crank revolution, this introduces a bit of drag when pedaling unassisted or beyond the 20 mph top speed
  • Minor complaint here, in order to mount the battery pack into the downtube bay, you actually have to insert and twist the key, you can’t just slam it in and have it click into place like some competing designs… this makes it sturdier and probably reduces rattling but also requires more time and energy to do, to go even further with this complaint, I wish that the first half-step could initiate without having to insert the key, just to keep the pack from tipping out if your hands are full and you’re struggling to balance the bike and insert the key… since the key inserts into the left side of the frame, that could be tricky to reach and do if the bike is actually on its side or leaning close to a tree
  • Standard chainring teeth vs. narrow-wide for increased grab, no chain pulley to raise the chain and reduce kickback (though I did not experience any), the molded chain guide should prevent drops and chain suck
  • Apparently most Trek mountain bikes do not come with pedals, it’s a minor gripe, you’ll have to pick up some aftermarket (I brought my own lightweight magnesium Wellgo pedals for this event)
  • The Purion display panel looks good and gets the job done, but it isn’t removable and doesn’t have a functional Micro-USB port like the older Intuvia display … I’ve heard that some ebike dealers will upgrade the display for you if you’re willing to pay, not sure if Trek will do this?
  • Official Site: https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/electric-mountain-bikes/c/B512/
  • More Pictures: https://photos.app.goo.gl/gJpiKx7LmqNJ4hD98

Review Updated On

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Comments (4) YouTube Comments

Great review, appreciate all the detailed information! A couple of questions…

  • Would a Powerfly be a reasonable choice for urban commuting and mixed use (50:50) recreational trail/road riding or would the set up and the knobby tires make these bikes a poor fit for the road?
  • If you were to compare the range of the Powerfly vs the Supercommuter +8s under identical conditions on the road, would the Powefly come up short? i.e. is the motor on the Powerfly tuned much more for torque than speed such that it would be range limited on the road?

Great question, Dave! I have done exactly what you suggest here because comfort is such a big deal for me and I only have had budget/space enough for one bike. I went with a full suspension Haibike, Easy Motion, and then Specialized over the past few years and just wore a backpack for supplies. The knobby tires produce more noise but otherwise work great in all conditions… not having fenders can mean you get wet and dirty, but there are some zip-tie mounting mud guards that could help with that as well. Regarding range… both the high speed motor and high torque motors use more energy, and a lot of this depends on where and how you ride, but the high-torque CX is my preference because it offers eMTB mode and can be ridden legally in more locations. You can always add some lights to the bike and wear a backpack to commute, but you cannot as easily take a Supercommuter off-road. I think you’d probably get similar range on both in urban environments :)

Hi Court, thanks for another fine review. Your mechanical camera shots keep getting better, so keep up with the shifting segments and suspension action, apparently taken using various frame or handlebar camera mounts… way cool. Additional closeups and camera time on suspension pivot points and other key mechanical features are always welcome. Please avoid the 1 hand MTB riding shots, use the helmet cam, I don’t want to lose you, man!

But I didn’t hear much about motor power. 250W just seems so small. Yes, I know there is a 15t in the front and a 46t in the back so even a 250W will climb dang near straight up, but still, how fast? I remember an old Hilltopper review you did and that little 250W motor chattered and stalled. Yes, I know that with the mid drive it is not going to chatter or stall on even a very steep hill, but aren’t you then limited to beginner speeds? Doesn’t that little 250W motor get boring after the first couple rides?

It seems that quality mid drives only come in 250W. Bafang makes 750W and 1000W but they are Chinese motors that don’t last and have some poorly engineered features, poor workmanship, and low grade materials (I’ve had my BBS02 apart 5 times, burnt winding, blown anti-vibration O ring, stripped plastic gear, broken steel ring gear teeth, blown controller FET).

Does a Japanese, European, or American manufacturer make a well engineered, reliable, mid drive in the 500W to 1000W range?

Thanks for the encouragement around frame shots, and your concern for my safety! Regarding motor power, think of it like 600 watts and up to 75 newton meters with an efficiency of 250 watts for flat sections. The Bosch Performance Line CX if very capable. It’s smarter and much more dynamic than other ebike motors (especially hub motors that tend to hype their peak output). In terms of mid-motors, I have found that the Bosch drive is one of the zippier and sportier feeling systems, I don’t think you’ll be bored at all. You are correct that Bafang has a series of more powerful motors, and that they tend to use less sophisticated sensors and possibly lower quality hardware. I haven’t spent as much time with those motors digging in the way it sounds like you have. As for premium mid-drive systems that reach into the 1,000 watt range… no, I think the Bosch CX, Brose S or S Mag, Shimano E8000, and Yamaha PW X are the best to consider and I’ve made a little comparison video with steep climbing that you can check out here .

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trek powerfly lt 9 plus 2019

  • Rider Notes

2019 Trek Powerfly LT 9.7 Plus

trek powerfly lt 9 plus 2019

A 27.5″ carbon frame full suspension enduro e-bike with high-end components. Compare the full range

trek powerfly lt 9 plus 2019

For This Bike

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Based on frame geometry and build specs.

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Powerfly LT 9.7 Plus

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Bikerumor

The 2021 Trek Powerfly full suspension e-MTBs blend European sensibility with modern trail capability for a unique e-mountain bike option.

Read Review

E-Mountainbike Magazine

Mar 2019 · Christoph Bayer

The Trek Powerfly LT 9.9 Plus is the result of several years of evolution. In this latest iteration, the bike features a classy carbon frame, a smartly integrated battery and the proven Bosch Performance CX motor. Will the bike still manage to convince our test riders?NEW: Before we get into the review, we would like […]

Excellent suspension

Balanced, composed handling

Good climbing capabilities

Front too low on steep descents

Cumbersome in tight sections

Loam Wolf

If I had to think of one common theme that continually came up during our time with the Powerfly, that would be it—too damn fun. Over the months we’ve had this bike, we’ve done it all and it does it all with ease.

MBR

Oct 2018 · Alan Muldoon

Up hill or down, ebikes take an absolute beating, so the new Trek Powerfly 9 has a beefed up the parts package to handle the additional abuse.

Suspension, brakes and tyres are all on point. New battery layout is neat and easy to use.

Could have more generous reach measurements and shorter stems on all sizes.

Flow Mountain Bike

Trek’s new 2019 Powerfly gives no mixed messages about its intentions. It is chunky, long, robust and built like a tank. With 160/150mm of travel, 40mm wide rims with 2.8″ tyres, e-bike specific FOX 36 the spec is undoubtedly up for a thrashing, and the chassis also. The newly integrated battery does wonders in making a …

Built tough.

Bosch E-MTB setting feels natural.

Fearless climber.

Length detracts from agility.

Heavy to move around.

Electric Bike Review

Price: $5499.00 | Model Year: 2019 A stealthy, long travel, all-mountain electric bike with longer wheel base and adjustable seat stay hardware to optimize geometry for climbing and descending, proprietary

A stealthy, long travel, all-mountain electric bike with longer wheel base and adjustable seat stay hardware to optimize geometry for climbing and descending, proprietary "Active Braking Pivot" rear suspension reduces skipping, Knock Block headset and Hartzell Hug impact-absorbing downtube bumpers allow for straight downtube

Trek-invented Boost hub spacing improves spoke bracing angle and support for larger plus sized tires, quick release thru axles are sturdy and easy to work with, direct-link rear suspension stiffens the chain stays and bottom bracket without compromising performance thanks to the DeonAir rear shock

Beautiful battery integration, Bosch PowerTube 500 disappears into the frame, keeps weight low and center, provides space for a bottle cage mount and accessories above, sturdy locking core from ABUS with keyed-alike code, battery has a built-in handle for secure removal and transport

Bosch Purion display does not have an active Micro-USB port, the PowerTube 500 is heavier than the older PowerPack design, longer wheel base isn't as nimble and the motor integration is flat vs. angled up (unless you get the carbon model), the motor is heavier than the competition, produces more noise, introduces some drag when unpowered

BikeRadar

Jun 2018 · Tom Marvin

The long back end is a constant across the size ranges, and so while the front end of the large isn’t super long, it’s still a relatively balanced-feeling bike.

Apr 2017 · Sean White

The Trek Powerfly is a very well sorted package and was one of the first e-bikes to win us over.

99 Spokes on YouTube

Last updated April 20 Not listed for 1,799 days

IMAGES

  1. Test: TREK POWERFLY LT 9 PLUS E-Bike 2019

    trek powerfly lt 9 plus 2019

  2. 2019 Trek Powerfly LT 9.9 Plus

    trek powerfly lt 9 plus 2019

  3. Trek Powerfly 9 LT Plus im Test: In Signalfarbe über den Trail

    trek powerfly lt 9 plus 2019

  4. Trek Powerfly LT 9 Plus Electric Bike 2019 Matte Olive Grey

    trek powerfly lt 9 plus 2019

  5. Trek Powerfly LT 9.9 Plus Electric Bike 2019 Matte Onyx/Gloss Black

    trek powerfly lt 9 plus 2019

  6. Bike Assault

    trek powerfly lt 9 plus 2019

VIDEO

  1. Trek Powerfly 5

  2. Trek Powerfly LT9 First Impressions + Gopro Run

  3. TREK Supercaliber 9.8 (2023): Discover The Ultimate Cross-Country Racing Mountain Bike

  4. TREK POWERFLY 9 2017

  5. Trek Powerfly 7 parts carnage and, a new frame!

  6. Trek Powerfly 9.9 2019 / Insane E-MTB / Best Trek E-MTB

COMMENTS

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  2. Trek Powerfly LT 9.9 Plus

    The 2019 Trek Powerfly LT 9.9 Plus is an E-Mountain Carbon mountain bike. It sports 27.5" wheels and has Fox suspension. The bike is part of Trek 's Powerfly range of mountain bikes. Powerfly LT 9.9 is a carbon full suspension electric mountain bike with the highest-level parts and suspension spec in the lineup.

  3. Trek Powerfly 9 LT (2019) first ride review

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  4. 2019 Trek Powerfly LT 9.9 Plus

    2019 · Trek Powerfly LT 9.9 Plus. A 27.5″ carbon frame full suspension enduro e-bike with ultra high-end components. Compare the full range. MSRP.

  5. Tested: Trek Powerfly LT 9 Plus 2019

    The big and burly Trek Powerfly LT 9 makes the most of its Bosch motor, wrapping it in a chassis that will climb just about anything you point it at. We took...

  6. Trek Powerfly LT 9.9 Plus Review

    Like its predecessors, the Trek Powerfly LT 9.9 Plus is a powerful climber. This is due in part to the powerful Bosch Performance CX motor, which is easy to modulate in eMTB mode, but it is also the result of the excellent geometry. As the rider, you are positioned very centrally on the bike, and thanks to the long rear linkage and the low ...

  7. Flow's First Bite: Trek Powerfly LT 9 Plus

    Trek's new 2019 Powerfly gives no mixed messages about its intentions. It is chunky, long, robust and built like a tank. With 160/150mm of travel, 40mm wide rims with 2.8″ tyres, e-bike specific FOX 36 the spec is undoubtedly up for a thrashing, and the chassis also. The newly integrated battery does wonders in making a long-travel e-bike ...

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    Trek Powerfly 2019 Review - now with a carbon frame and fully-integrated battery ... Incredibly stylish and very classy - the new Trek Powerfly LT 9.9 with a carbon frame for € 7,999. ... All Plus models are now rolling on sturdy, grippy Bontrager XR4 tires and all Powerfly LT models feature powerful four-piston brakes.

  11. Trek Powerfly LT 9.9 Plus 2019

    The Trek Powerfly LT 9.9 Plus 2019 is a Full suspension Enduro Mountain Bike with a carbon frame. Equipped with a SRAM XX1 Eagle drivetrain of 12 gears (1x12). Its features include internal routing, dropper seatpost, and boost 110 . The bike weighs approximately 22,77 kg.

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    2019 Trek. Powerfly LT 9.9 Plus. A 27.5″ carbon frame full suspension enduro e-bike with ultra high-end components. ... The Trek Powerfly LT 9.9 Plus is the result of several years of evolution. In this latest iteration, the bike features a classy carbon frame, a smartly integrated battery and the proven Bosch Performance CX motor. ...

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  20. Trek Powerfly 7 LT Review

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