Powerfly 4 is our most affordable electric mountain bike. It's built with parts that hold up, like a smooth-shifting Shimano drivetrain, and a powerful Bosch motor. Plus, it features our user-friendly Removable Integrated Battery (RIB) system that's fully encased in the frame yet doesn't require tools for removal. This bike expands your boundaries and lets you travel to destinations you never thought you'd reach on a mountain bike.
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.
A tough yet refined aluminum frame that fully encases a 500Wh battery for sleek looks. The latest from Bosch with smart system Performance Line CX motor, capable of speeds up to 20MPH, including the new Bluetooth® LED remote for easy connectivity and all-in-one navigation and activity tracking through the eBike Flow app. A 1x10 Shimano drivetrain, and a suspension fork with lockout. Plus, Smart Wheel Sizing means riders of every size get a great fit—29˝ wheels on larger frames, 27.5˝ wheels on smaller frames.
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.
*Please note - spec applies to all sizes unless listed separately
- 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
- The top-notch new Bosch smart system gives you more control over your ride with navigation and activity tracking through the eBike Flow app
- It comes equipped with Walk Assist and an intelligent e-MTB mode that automatically delivers the right amount of power based on your terrain
- It's equipped with an external charging port for easy charging on or off the bike
- 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
Components
| *Frame |
Size: XS , S
Alpha Platinum Aluminum, curved top tube, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148, 12mm thru axle |
Size: M , L , XL
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, 44 mm offset, Boost110, 15 mm thru axle, 80 mm travel |
Size: S , M , L , XL
SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44mm offset, Boost110, 15mm thru axle, 120mm travel |
| Max compatible fork travel |
120mm (526mm axle-to-crown), XS: 80mm (492mm axle-to-crown) |
| 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, 12 mm thru axle |
| Skewer rear |
Bontrager Switch thru axle, removable lever |
| Rim |
Bontrager Connection, double-wall, 32-hole, 20 mm width, Presta valve |
| *Tire |
Size: XS , S
Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.35" |
Size: M , L , XL
Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.30" |
| Max tire size |
Frame: 29x2.60" or 27.5x2.80" (XS & S: 27.5x2.60"), Fork: See manufacturer |
| Shifter |
Shimano Deore M4100, 10 speed |
| Rear derailleur |
Shimano Deore M5120, long cage |
| Crank |
FSA Bosch CK-220, 36T ring, 165 mm length |
| Chain ring |
FSA, 36T, steel |
| Cassette |
Shimano Deore M4100, 11-46, 10 speed |
| Chain |
KMC X10, 10 speed |
| Pedal |
VP-536 nylon platform |
| Max chainring size |
1x: 38T |
| 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 rotor |
Tektro, 6-bolt, 203mm |
| Brake Set |
Tektro HD-M275 hydraulic disc |
| Rotor size |
Max brake rotor sizes - Frame: 203mm, Fork: see fork manufacturer
|
|
Battery
|
Bosch PowerTube 500Wh, smart system |
| Charger |
Bosch standard 4A, 110V, smart system |
| Controller |
Bosch Intuvia 100, smart system |
| Motor |
Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm |
| Computer |
Bosch LED remote, smart system |
| Weight |
M - 23.94 kg / 52.78 lbs |
| 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, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.
