2023 Trek Powerfly 4 Gen 4
Powerfly 4 is our most affordable electric mountain bike. It's built with parts that hold up, like a smooth-shifting Shimano drive train, 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 that you never thought you'd reach on a mountain bike.
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 that an e-MTB with the latest user-friendly tech is the best way to get them.
The tech you get
A tough yet refined aluminium frame that fully encases a 500 Wh battery for sleek looks. The latest from Bosch with smart system Performance Line CX motor, capable of speeds up to 20 mph (25 km/h in Europe), 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.
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.
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
- 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 mudguards, plus built-in wiring lets you easily install lights powered by the motor.
*Please note – spec applies to all sizes unless listed separately
| *Frame |
Size: S Alpha Platinum Aluminium, curved top tube, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armour, Boost148, 12 mm thru axle |
|---|---|
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Size: M , L , XL Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armour, Boost148, 12 mm thru axle |
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| Fork | SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44 mm offset, Boost110, 15 mm thru axle, 120 mm travel |
| Max compatible fork travel | 120mm (526mm axle-to-crown), XS: 80mm (492mm axle-to-crown) |
| 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 |
| Skewer rear | Bontrager Switch thru-axle, removable lever |
| Rim | Bontrager Connection, double-wall, 32-hole, 20 mm width, Presta valve |
| *Tyre |
Size: S Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.35" |
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Size: M , L , XL Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.30" |
|
| Max tyre 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 |
| Chainring | 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: S Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length |
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Size: M Bontrager alloy, 31.6 mm, 12 mm offset, 360 mm length |
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Size: L , XL Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length |
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| *Handlebar |
Size: S Bontrager alloy, 31.8 mm, 15 mm rise, 720 mm width |
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Size: M , L , XL Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width |
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| *Grips |
Size: S , M , L , XL Bontrager XR Endurance Comp, lock-on |
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Size: S , M , L , XL Bontrager XR Endurance Comp |
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| *Stem |
Size: S , M Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 60 mm length |
|
Size: L , XL Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 70 mm length |
|
| Head set | FSA IS-2, 1-1/8" top, 1.5" bottom |
| Brake rotor | Tektro, 6-bolt, 203 mm |
| Brake Set | Tektro HD-M275 hydraulic disc |
| Rotor size | Max brake rotor sizes - Frame: 203mm, Fork: see fork manufacturer |
| Battery | Bosch PowerTube 500 Wh, smart system |
|---|---|
| Charger | Bosch standard 4A, 110 V, 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 136 kg (300 lb). |
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, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.
