The Powerfly 4 Equipped outfits our most affordable electric mountain bike with everything you need for rugged daily commutes and trail adventures. Read more.
The Powerfly 4 Equipped outfits our most affordable electric mountain bike with everything you need for rugged daily commutes and trail adventures. It's built with sturdy parts and it features a powerful Bosch motor and our user-friendly Removable Integrated Battery (RIB) system. You also get commute-ready accessories like mudguards, a rear rack and front and rear lights that are powered by the e-MTB system.
Affordable, versatile, capable. This e-MTB is great for commuting, trail riding and rugged touring. It comes with a high-end Bosch motor, RIB battery system and controller that are as reliable as they are easy to use.
A durable 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, 85 Nm) motor that assists up to 20 mph (25 km/h in Europe), a Bosch Purion controller, a 1x10 Shimano drivetrain and an SR Suntour suspension fork with lockout. Comes equipped with mudguards, a rear rack, and front and rear lights powered by the battery.
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. The larger frames (M and ML) have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.
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 further 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.
Frame | Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148 |
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*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 |
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Max compatible fork travel | 120mm (XS & S: 100mm) |
Fender/rack mounts | Trek Powerfly custom integrated rack |
Hub front | Formula DC-511, 6-bolt, Boost110, 15 mm thru axle |
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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 |
Spokes | 14 g stainless steel |
*Tyre | Size: XS , S Bontrager LT4 Expert, reflective strip, wire bead, 60 tpi, 27.5x2.40" |
Size: M , L , XL Bontrager LT4 Expert, reflective strip, wire bead, 60 tpi, 29x2.40" |
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Max tyre size | Frame: 29x2.40" (XS & S: 27.5x2.60") Fork: See manufacturer |
Shifter | Shimano Deore M4100, 10 speed |
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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 |
Max. chainring size | 38T |
Saddle | Bontrager Commuter Comp |
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*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 |
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Size: L , XL Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length |
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Handlebar | Bontrager alloy, 31.8 mm, 15 mm rise, 720 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 |
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Size: L Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length |
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Size: XL Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 80 mm length |
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Head set | FSA IS-2, 1-1/8" top, 1.5" bottom |
Brake | Tektro HD-M275 hydraulic disc |
*Brake rotor | Size: XS , S , M , L , XL Tektro, 180 mm, 6-bolt |
Size: XS , S , M , L , XL Tektro, 6-bolt, 203 mm |
Battery | Bosch PowerTube, vertical, 500 wh |
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Charger | Bosch compact 2A, 100–240V, smart system |
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 |
Light | AXA Blueline taillight |
Kickstand | Pletscher Comp Flex 18 |
Cargo rack | MIK Compatible alloy rear rack |
*Mudguard | Size: XS , S Trek Powerfly 27.5'' custom fender |
Size: XS , S , M , L , XL Trek Powerfly custom mudguard |
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Size: M , L , XL Trek Powerfly 29'' custom fender |
Weight | M - 25.59 kg / 56.42 lb (with tubes) |
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Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb). |