2019 Trek Powerfly ebike first look

Dialing in the platform adding the LT version with 150mm of travel

E-bike News

The Powerfly is starting to feel dialed in corners and in the air.

What’s new in 2019

Trek has been at this for a while with a wealth of experience in Europe and now entering its third generation of Powerfly full suspension ebikes. Their ebikes have gone from decent efforts to evolved machines. New in this generation are an advanced removable battery system, carbon fiber frames, purpose-built ebike components and the 150mm of travel in the LT model.

Battery placement is one of the most refined we’ve seen around.

Removable Integrated Battery (RIB)

Trek spent a lot of R&D time developing a removable battery system with their new internally mounted Bosch batteries. They found a significant need or desire by their customers to remove the battery from the bike, replacing it with a fresh one or charge it away from the bike.

What they came up with is a drive-side side access battery that can be removed without any tools. It has a carrying handle and it is integrated with a frame side panel that matches the frame color. And the key is the frame integrity and vibration is not compromised at all.

It is a very good design feat indeed but we feel it’s not of significant value to all users. Batteries are typically charged on the bike so we never really take the battery off. And we typically just have one battery and one charger so that all stays in the garage near the bike for charging. In a commuting situation, where one has to charge the battery at work due to a very long commute, this can come in very handy, allowing the rider to take the battery in the office to charge.

Powerfly LT 9.7 with carbon frame

Carbon Fiber Frame

Carbon fiber ebikes are a bit of an enigma because ebikes are heavy and carbon is usually chosen for its light weight. Often, the weight savings in carbon are not significant in lightening the weight of the bike.

But in testing, Trek found the vibration damping characteristics of carbon helped the ride quality of Powerfly 9.7 LT. Also, stiffness gains and molding and shaping abilities of the material allowed a better, more elegant frame. Weight savings is 650 grams or 1.5 lbs so it is a good step in getting the quest to get these bikes lighter. We’ve found that most of the ebikes today weigh in at 50+ lbs and getting them under 45 lbs offers some attractive advantages.

Dialed suspension

One of the great pursuits in ebikes is getting a suspension platform that is suited to the task. The normal stuff works but its definitely a compromised ride since they are made for 30 lb bikes. A 50 lb bikes has higher demands on damping and flex. Now the forks used by the Powerfly from Fox and Rockshox have bigger, thicker stanchions and have more supported damping tunes for the weight and speed of ebikes.

They don’t have faster downhill speeds but the unsprung weight is heavier and they dive more and hit things harder on drops and technical climbs with faster approach speeds. These new suspension bits make the ride feel normal and the rider is less apt to notice differences from riding their usual non-assisted rigs.

Switching batteries has never been easier.

Other details

The new Powerflys use powerful, 4-piston brakes with big rotors to address the demands of ebikes. These bikes go a hair faster into corners and they definitely go farther and higher so an upgraded brake system is welcome. It’s only a 20lb bike weight penalty but it is unsprung and the rider typically tackles bigger and longer descents.

Sram Eagle 1×12 is now employed instead of the previous generation’s 1×8 EX. The Sram 1×8 ebike optimized EX was a good concept but it did not offer an appreciable advantage or cost savings unfortunately. And most consumers considered it a downgrade. Sram has gone into the familiar, proven Eagle GX which is strong enough to handle the demands of ebikes.

Proper wide wheels and supported tires to match the weight of the bike

The Bontrager XR4 tires may be one of the unfair advantages of the new Trek bikes since they roll and corner so well. Now, they have the widths and sidewalls to match up to the Powerflys.

Sticking with Bosch

With all the new motor drive systems being introduced, Trek is putting all their eggs in the Bosch basket because they consider them to have the best product, support and availability. It’s a booming market with significant support needs coming up in the horizon and Bosch is building the support infrastructure that the user base will be demanding.

These motor drives and batteries will need servicing and even the most astute mountain bikers will need help keeping them spinning for years to come.

We find the new Bosch CX line very competitive indeed and their eMTB mode, the best in class. eMTB mode is a riding mode that spans all the modes of Eco, Cruise and Turbo thus allowing the rider to complete an entire ride in one mode. They system senses the power input of the rider and gives them a little push or the full boost the motor can provide.

They jump a little different but they can certainly be playful.

Powerfly LT

OCLV Carbon and Alloy 160mm/150mm travel
27.5×2.8” tires on all models 4-piston brakes on all LT models

Powerfly Full Suspension

130mm travel
27.5 x 2.8” tires on 7 27.5 x 2.35” tires on 5


And finally, Trek seems to be the most trail aware ebike company of all as they spend a significant amount of time working on ebike advocacy and education. They regularly meet & educate local land managers to expose them to what ebikes really are and how they can exist and impact the land they manage. And they spend a significant effort with People for Bikes working in each state to tackle the maze of laws and hurdles to allow responsible ebike use.



No more SRAM 1×8 EX since customers perceive it to be a downgrade.

Frequently Asked Questions

What’s new in the Powerfly lineup this year?

As e-bikes continue to evolve, so does Powerfly. The most visible update this year is Trek’s exclusive new Removable Integrated Battery, or RIB. The Bosch PowerTube 500 battery is fully integrated into the side of the downtube. It looks great, and makes the frame compatible with a water bottle cage, but the biggest benefit is the convenience. Unlike other fully integrated batteries, RIB is simple to remove and re-install with no tools or complicated parts.

Powerfly is offered as three distinct families: Hardtail, Full Suspension (130mm) and Long Travel (150mm), which is new to North America. We’re also offering a carbon model in the Long Travel lineup. OCLV Mountain Carbon offers cleaner aesthetics, a quieter ride, and easier handling thanks to lower weight.

Major spec upgrades include:

– A more robust RockShox Revelation fork on Powerfly FS 7

– More powerful 4-piston disc brakes on all Powerfly LT models

– Tougher Bontrager XR4 tires on all Plus models

What’s the difference between Powerfly FS and Powerfly LT? Who is the customer for each?

The 130mm Powerfly FS balances comfortable, efficient climbing with confident handling on descents and corners for the best overall trail bike feel. The 150mm Powerfly LT offers added downhill capability with more travel, more stable handling, and more robust parts.

All the setting have to be dialed and all the skills have to be called upon

What’s the difference between Powerfly and Powerfly Women’s?

Powerfly Women’s models have the same high-performance frame technology and geometry as the mainline Powerfly hardtail. All sizes except for the 18.5” feature curved top tubes for lower standover height that makes mounting and dismounting easier for shorter riders. The Women’s models also come with women’s specific saddles, narrower handlebars, and an alternate color.

What is the maximum tire size for each frame platform?

The 130mm full suspension (FS) bikes and 150mm long travel (LT) bikes can accept up to 27.5×2.8” tires. The 17.5” and larger size hardtail models can accept up to 29×2.4” or 27.5×2.8” tires. The 15.5” and smaller hardtails will not fit 29” tires, but can accommodate 27.5×2.8” tires.



What if I need to replace the battery or battery cover?

Powerfly’s use a stock Bosch Powertube battery. The frame cover and battery are one-piece, but can be separated. Trek will sell frame covers through Trek retailers for replacement or for those that want to have a second battery that can be swapped out quickly.

Scree is the perfect size but it is far from centered to provide button access.

Are spare keys available?

Yes. Spare keys are available through the lock manufacturer, ABUS. They’ll need the key code printed on a card that’s included with the bike.

Will the bike support e-Shift integration with drivetrain (Shimano, Nuvinchi, Rohloff)?

Yes. Contact Bosch to acquire the correct wiring harness.

How fast can it go?

It will go as fast as your legs turn the pedals. However, the pedal assist cuts out at 20mph.

Is there a way to bypass the speed governor to modify the top assisted speed?

No. It’s part of the programming. Modifying the regulated assisted speed will void the warranty and puts the rider at risk of violating laws governing pedal assist bikes.

Stunning landscape but hard to climb to the top with no assistance

Can I ride the bike in the rain or wet conditions? Can I wash it?

Yes. The Bosch system, including the battery, is weatherproof and will function fine in wet conditions. The motor is further protected from mud and rocks by Trek’s exclusive Motor Armor that also acts as a skid plate over large obstacles. However, none of the Bosch components should ever be submerged in water or cleaned with a high-pressure hose or power washer.

How long does the battery last?

The 500Wh battery has an approximate range of 170km in Eco mode, and 60km in Turbo mode. Actual range will depend on various factors such as terrain type, incline grade, and individual riding style.

How long does it take to fully charge the battery?

From empty to fully charged will take about 4.5 hours. From empty to 50% charged will take only 2 hours.

Does the battery require any special care?

The battery should never be opened, as doing so not only voids all warranties, but also poses the risk of uncontrolled thermal reactions. Use only the provided Bosch eBike charger, which is specifically matched to the Bosch battery and has the right software for optimal charging and maintenance of the battery. Using any other charger will void the warranty and also risk malfunctions or reduced lifespan. Lithium-ion batteries have neither memory nor self-discharge effects, so the battery can be partially recharged at any time without affecting the service life.

Minolink with adjustable travel is a great option

Where’s the throttle?

Powerfly is a Class 1 pedal-assist mountain bike. It amplifies the power the rider puts in while pedaling. If the rider isn’t pedaling, the bike is not assisting. It is not self-propelled.

Will walk assist/drive feature be enable-able?

Yes. If it’s not already enabled out of the box, it can be with the retailer software.

Where can I legally ride this bike?

Regulations on where eMTB bikes can be ridden legally vary by state and whether the land is federally, state, county or privately owned. Trek and IMBA promote a position that safely guides eMTB users towards trails that won’t be questionable: “E-MTBs are approved for use on trails that allow pedal-assist or motorized vehicles. You are responsible for knowing and complying with all regulations and use laws. If uncertain about trail status, check with local parks management or consult your retailer.“

Where can I learn more about eMTB regulations?

People For Bikes has a well-curated list of resources and explanations surrounding eMTB: www.peopleforbikes.org/e-bikes

Do eMTB’s have any more impact on trails than traditional mountain bikes?

“Not significant.” IMBA conducted a study of Type 1 (low speed pedal assist) mountain bikes, like the Powerfly, and found that “the impacts from Class 1 eMTBs and traditional mountain bicycles were not significantly different, while motorcycles led to much greater soil displacement and erosion.” In short, riding poorly constructed mountain bike trails or riding trails while still wet will have much more impact than eMTB riding. You can find the full study on People For Bike’s e-bike resources.



More Info: https://www.trekbikes.com/us/en_US/

About the author: Francis Cebedo

The founder of mtbr and roadbikereview, Francis Cebedo believes that every cyclist has a lot to teach and a lot to learn. "Our websites are communal hubs for sharing cycling experiences, trading adventure stories, and passing along product information and opinions." Francis' favorite bike is the last bike he rode, whether it's a dirt jumper, singlespeed, trail bike, lugged commuter or ultralight carbon road steed. Indeed, Francis loves cycling in all its forms and is happiest when infecting others with that same passion. Francis also believes that IPA will save America.

Related Articles


  • Train Hard says:

    Nice motorcycle! Joe, if you do have an injury and knee problems spend your time with your physio in the gym then get back on the trails. These Ebikes will complicate our already sensitive relationship[s] with other trail users.

  • r says:

    eBike is good for delivering food, like Ubereats, nothing more.

  • ejbrockway says:

    Lame. MTBR shame on you for writing this up like a ligit bike.

  • Halstead says:

    As someone slightly involved with the legislation and as a trail user on many levels who often thinks the government entities in charge have forgotten whop owns the lands,which, for the most part all of us, I understand the concerns. I am getting older and while I do not yet have a ebike I think to keep riding, especially to keep up with my kids, and enjoy retirement an emtb is in my future. BUT, to me the class 1, pedal assist, no throttle, no go without pedaling, is the only unit type I will support. There is no evidence that class 1 bikes have any negative impact, unless enabling folks to live their passion a bit longer is something you are against. Bike that require no rider input except to twist a grip are in my book motor vehicles and should be banned from no motorized trails. Ride a Class 1 then decide. Its still work. .

    • Francis Cebedo says:


      Mountain biking is a very exclusive sport and that’s one of the reasons why we have little access. We need to make it more inclusive. Include the ones who may not be as fit, as young and as willing to suffer. Include the the decision makers, the land managers, the board members.

  • agmtb says:

    I turn 65 next month. In about 10 years I may consider an eMTB an option. For now my Turner Flux rocks! Espically here in the Sonoran Desert’s rocky trails

  • Pete Cherry says:

    You naysaers will eventually buckle as ebikes continue to progress to the point you will have to look closely to tell if it’s a pedal or pedal assist. for sure, you’ll cave in and get yourself one because you’ll want that competitive edge, to go longer and faster. And if you don’t change, the ebikers will be the ones to put their noses up at you, leave you in the dust, because you’re stuck in the past. Ebikes rule!

  • Haibike in your face says:

    Pete Cherry…amen my brotha! I own a Haibike 5.0 and a Pivot 429 trail. Living in So Cal I can ride my ebike just about anywhere I want. These toys are great for days when its too hot and when I’m a little crispy from the previous nights activities. If I don’t feel like riding either of my pedal bikes, I’ll take out my BWM R1200GS through the canyons of Santa Monica. Too many people get hung up on the legal aspects of progression. Just remember to move over when I pass you on the left! Ha Ha!

  • Bob Lawrence says:

    Whiny puritan bitches… eBikes are going to surpass regular antiquated pedal bikes in 10 years or less, stop complaining about how amazing you are for not trying them and do your research and have some fun. The biggest complaint I hear from riders is they don’t want to be passed, this is a ego battle not a bike/ebike battle. Find a real cause like plastic recycling in India…

  • Fasterjason says:

    The writer is mistaken about what unsprung weight is. Unsprung weight is the weight of the tires, wheels, brake calipers, and moving suspension components (e.g., fork lowers).

    In the “Dialed Suspension” and “Other Details” sections the extra weight of the motor and battery is referred to as unsprung weight when it is actually sprung weight.

  • Fuel53 says:

    Yes, in 10 years it will be hard to visually tell the difference between human powered and motor powered bikes. While ebikers are so concerned about having fun, you are jeopardizing access to a multitude of trails that hinge on the concept of non motorized or human powered only. Putting these motorcycles on the same plane as bicycles opens up justifications to ban bikes of any kind from multi-use trails. Your fun will potentially come at the expense of access to multi-use singletrack- mountain biking simply doesn’t exist without trails!!!!

    • Dennis says:

      The bike is not considered a motorized vehicle as it still takes the pedaling of the bike to move it. There is no throttle. So I wouldn’t worry too much. There are more and more ebikes on the trails I ride and they don’t get in the way or bother anyone. Just another group having fun.

  • Gregk111 says:

    Im an advanced XC rider and traded my Stumpy for a Turbo Levo and love it. I ride twice as often and twice as far. I get way more of a workout, especially upper body and arms. I don’t worry about bringing extra gear or running lower tire pressures. pitches and ledges that were 20% make are now 80% make. I’m trying and getting over obstacles that were strictly hike a bike. If we lose trail access it will be from the DH banzai riders that use too much rear brake and damage the trail or scare the hikers. My ebike doesn’t do any more trail wear than my old stumpy.

Leave a Reply

Your email address will not be published. Required fields are marked *





© Copyright 2020 VerticalScope Inc. All rights reserved.