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2021-2022

Powerfly 4 Gen 3

Model 1042637

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.

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Pricing details

Retailer price

Retailer pricing applies when you purchase goods online that the shop has in stock today. Order is subject to retailer acceptance.

MSRP

Manufacturer’s Suggested Retail Price. This is the price you’ll pay ordering directly from Trek. Total price including shipping and taxes may be seen in the cart.

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*Please note - spec applies to all sizes unless listed separately

*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, 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
Max compatible fork travel 120mm, XS & S: 100mm
Hub front Formula DC-511, 6-bolt, Boost110, 15mm thru axle
Hub rear Bontrager Approved DC-3248, 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''
Max tire size Frame: 29x2.60" or 27.5x2.80" (XS & S: 27.5x2.60"), Fork: See manufacturer
Battery Bosch PowerTube 500Wh
Charger Bosch compact 2A, 100-240V
Computer Bosch Purion
Motor Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 20mph or 32km/h max assist
Shifter Shimano Deore M4100, 10 speed
Rear derailleur Shimano Deore M5120, long cage
Crank FSA Bosch CK-220, 36T ring, 165mm 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: 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 Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length
Size: S , M
Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 60mm length
Size: L , XL
Bontrager Comp, 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
Weight M - 23.37 kg / 51.53 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. Prices shown are manufacturer's suggested retail prices.

Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.