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It's right for you if...

You're sold on the e-bike revolution and want the capability and versatility of a mountain bike at a price that doesn't resemble the car you're trying to use less. You want bigger, better off-road adventures, and know an e-MTB with the latest user-friendly tech is the best way to get them.

The tech you get

A tough yet refined aluminum frame that fully encases a long-range 500Wh battery for sleek looks, a Bosch Performance CX (250W, 75Nm) motor that assists up to 20 mph or 32 km/h, a Bosch Purion controller, a 1x10 Shimano drivetrain, an SR Suntour fork with lockout, and hydraulic disc brakes. Plus, Smart Wheel Sizing means riders of every size get a great fit—29˝ wheels on larger frames, 27.5˝ wheels on smaller frames.

The final word

Our most affordable electric mountain bike comes with the same powerful Bosch motor and intuitive controller as our most expensive e-bikes, with a smaller battery and parts chosen to give you great value.

The Walkthrough

favorite_borderWhy you'll love it

  1. Trek's Removable Integrated Battery (RIB) system looks great and is super user-friendly: it fully hides the battery in the frame for protection, makes it easy remove the battery without tools and lets you mount a water bottle cage
  2. This bike expands boundaries: the top-notch Bosch system is equally suited to commuting, recreation, and a ridiculously fun time on the trails
  3. The Purion controller has Walk Assist and an intelligent eMTB mode that automatically delivers the right amount of power based on your terrain
  4. It's equipped with an external charging port for easy charging on or off the bike
  5. You can boost your Powerfly’s utility by adding a rack and fenders, plus built-in wiring lets you easily install lights powered by the motor

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Features

Will my bike have a curved top tube?

Will my bike have a curved top tube?

Smaller frames (S) have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. Larger frames (M and up) have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.

New Bosch Performance Line CX

New Bosch Performance Line CX

The all-new Bosch Performance Line CX motor is lighter, smaller, and quieter than previous versions, for cleaner integration and more nimble handling. It's also more efficient so you can go farther on a single battery charge. Use the intelligent eMTB mode to automatically adjust the amount of assist to match the terrain. It's a set-and-forget mode that delivers just the right amount of power so you can focus on enjoying the ride.

Removable Integrated Battery

RIB is a one-piece battery and cover with a built-in handle that can easily be removed and re-installed in the frame with no tools and no hassle. It’s the most convenient way to remove your battery for transport, security, or just easier charging.

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Specifications

*spec applies to all sizes unless otherwise noted

Frameset
Frame Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148, 12mm thru axle
*Fork Size: XS
SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44mm offset, Boost110, 15mm thru axle, 80mm travel
Size: S , M , L , XL
SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44mm offset, Boost110, 15mm thru axle, 120mm travel
Wheels
Hub front Formula DC-511, 6-bolt, Boost110, 15mm thru axle
Hub rear Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru axle
Skewer rear Bontrager Switch thru axle, removable lever
Rim Bontrager Connection, double-wall, 32-hole, 20mm width, presta valve
Spokes 14g, stainless steel, black
*Tire Size: XS , S
Bontrager XR3 Comp, wire bead, 30tpi, 27.5x2.35''
Size: M , L , XL
Bontrager XR3 Comp, wire bead, 30tpi, 29x2.30''
Drivetrain
Shifter Shimano Deore M4100, 10 speed
Rear derailleur Shimano Deore M5120, long cage
Crank FSA Bosch CK-220, 36T ring, 165mm length
Cassette Shimano Deore M4100, 11-46, 10 speed
Chain KMC X10, 10 speed
Pedal VP-536 nylon platform
Components
Saddle Bontrager Commuter Comp
*Seatpost Size: XS , S
Bontrager alloy, 31.6mm, 12mm offset, 330mm length
Size: M
Bontrager alloy, 31.6mm, 12mm offset, 360mm length
Size: L , XL
Bontrager alloy, 31.6mm, 12mm offset, 400mm length
*Handlebar Size: XS , S
Bontrager alloy, 31.8mm, 15mm rise, 720mm width
Size: M , L , XL
Bontrager alloy, 31.8mm, 15mm rise, 750mm width
Grips Bontrager XR Endurance Comp, lock-on
*Stem Size: XS
Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 50mm length
Size: S , M
Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length
Size: L , XL
Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 70mm length
Headset FSA IS-2, 1-1/8'' top, 1.5'' bottom
Brake Tektro HD-M275 hydraulic disc
Brake rotor Tektro, 203mm, 6-bolt
Accessories
Battery Bosch PowerTube 500
Charger Bosch compact 2A (100-240V) charger
Controller Bosch Purion
Motor Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 20mph or 32km/h max assist
Weight
Weight M - 23.67 kg / 52.18 lbs (with tubes)
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based off Trek pre-production painted frames at time of publication. Weights may vary in final production.

Sizing & fit

The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.

 

Rider Height

Inseam

All measurements provided in cm unless otherwise noted.

Frame size number Frame size letter Wheel size A — Seat tube Effective seat tube angle C — Head tube length D — Head angle E — Effective top tube F — Bottom bracket height G — Bottom bracket drop H — Chainstay length I — Offset J — Trail K — Wheelbase L — Standover M — Frame reach N — Frame stack
14.5 XS 27.5" 36.3 70.0° 12.0 65.0° 57.9 32.8 3.7 45.5 5.1 11.4 113.5 74.3 35.2 62.1
15.5 S 27.5" 39.4 71.6° 13.0 67.6° 59.8 30.7 4.9 45.5 4.2 10.1 112.5 72.2 39.0 62.3
17.5 M 29" 41.9 71.7° 13.0 67.7° 61.8 32.4 4.9 45.5 5.1 9.8 115.3 79.5 40.6 63.9
19.5 L 29" 47.0 71.7° 14.0 67.7° 64.1 32.4 5.0 45.5 5.1 9.8 118.0 75.8 42.7 64.9
21.5 XL 29" 52.1 71.7° 16.0 67.7° 67.2 32.4 5.0 45.5 5.1 9.8 121.2 76.8 45.2 66.7

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