Powerfly 4 is our most affordable electric mountain bike
It's built with parts that hold up, like a dependable 9-speed Shimano drive train, a 120 mm SR Suntour fork and a powerful Bosch Performance CX 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 that you never thought you'd reach on a mountain bike.
Features:
- 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 trail adventures and know that an e-MTB with the latest user-friendly tech is the best way to get them. - The tech you get
A lightweight and durable Alpha Platinum Aluminium frame that fully encases a long-range 500 Wh battery for sleek looks and protection on the trail, a Bosch Performance CX (250 W, 75 Nm) motor that assists up to 25 km/h, an ergonomic Bosch Purion controller, a Shimano drive train, a 120 mm SR Suntour XCR fork with lockout and hydraulic disc brakes. Plus, Smart Wheel Sizing means you'll get the fastest wheel that fits – 29˝ wheels on larger frames, 27.5˝ wheels on smaller frames. - The final word
Our most affordable electric mountain bike is equipped with performance parts, a high-end Bosch motor, powerful battery and intuitive controller for confidence and a fun boost on trails and roads.
Why you'll love it
- 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
- This bike expands boundaries: the top-notch Bosch system is equally suited to commuting, recreation and a ridiculously fun time on the trails
- The Purion controller has Walk Assist and an intelligent eMTB 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 mudguards, plus built-in wiring lets you easily install lights powered by the motor
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.
Specifications
*spec applies to all sizes unless otherwise noted
Frameset
Frame: Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148
*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, 44 mm offset, Boost110, 15 mm thru axle, 120 mm travel
Wheels
Hub front: Formula DC-511, 6-bolt, Boost110, 15 mm thru axle
Hub rear: Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12 mm thru axle
Rim: Bontrager Connection, double-wall, 32-hole, 20 mm width, Presta valve
Spokes: 14 g stainless steel
*Tyre: 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"
Drivetrain
Shifter: Shimano Deore M4100, 10 speed
Rear derailleur: Shimano Deore M5120, long cage
Crank: FSA Bosch CK-220, 36T ring, 165 mm 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, 31.6 mm, 12 mm offset, 330 mm length
Size: M
Bontrager alloy, 31.6 mm, 12 mm offset, 360 mm length
Size: L , XL
Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
*Handlebar: Size: XS , S
Bontrager alloy, 31.8 mm, 15 mm rise, 720 mm width
Size: M , L , XL
Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width
Grips: Bontrager XR Endurance Comp
*Stem: Size: XS
Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 50 mm length
Size: S , M
Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 60 mm length
Size: L , XL
Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length
Head set: FSA IS-2, 1-1/8" top, 1.5" bottom
Brake: Tektro HD-M275 hydraulic disc
Brake rotor: Tektro, 6-bolt, 203 mm
Accessories
Battery: Bosch PowerTube, vertical, 500 wh
Charger: Bosch compact 2A (100-240 V) charger
Controller: Bosch Purion
Motor: Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 25 km/h (15.5 mph) max assist, 32 km/h for New Zealand
Weight
Weight: M - 23.67 kg / 52.18 lb (with tubes)
Weight limit: This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).