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Trek Powerfly FS 4 EQ Electric Mountain Bike 2021

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Powerfly FS 4 EQ Electric Mountain Bike 2021

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Product ID: 1324417

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Trek Powerfly FS 4 EQ Electric Mountain Bike

Comfortable, fast, and efficient - The Trek Powerfly FS 4 EQ Electric Mountain Bike is ready for adventure whether town or trail. With a powerful Bosch motor system and 100mm of rear suspension, the Powerfly FS combines the comfortable ride of a full-suspension bike with the efficiency of a hybrid. This makes it a versatile one-bike solution for riders looking to breeze their ride to work midweek, then rack up the singletrack miles on the weekend. This Equipped edition features a pannier rack, mudguards and lights as stock, and is ready to go the distance on any terrain.

With a durable aluminium frame and rugged component specification, the Powerfly FS is a bombproof option to get you from A to B. The downtube stealthily conceals a removable integrated PowerTube 625wh battery, that packs enough power for all-day riding and is chargeable both on and off the bike. The Bosch Performance CX drive system features a lightweight magnesium motor body and 250w of climb-crushing power, meaning it is highly capable both on and off-road. Ideal for the commute, 75 Nm of torque ensures you arrive at work sweat-free and ready for your day. The Bosch Purion controller features a Walk Assist setting, making it easy to manoeuvre in off-bike situations.

With a focus on everyday riding, this Equipped edition comes pre-fitted with essential ride accessories to improve your ride experience. Mudguards help to defend against road spray and splatter, keeping you dry for the duration of your ride. Front and rear lights help to improve visibility in low-light situations, drawing power from the battery to ensure a simple charging experience. A rear pannier rack and stand add a further day to day convenience, while a dropper seatpost adds flow on mixed gradient trail rides. The 10-speed Shimano Deore drivetrain offers a wide range of gearing, and powerful hydraulic brakes provide ample stopping power both on and off-road.


  • Commute ready, equipped with mudguards, rear pannier rack and battery powered lights
  • Powerful Bosch Performance CX motor system, with 250w of power and 75 Nm of torque
  • Bosch Kiox full-colour display with Bluetooth® connection and anti-theft feature
  • High capacity 625wh Bosch PowerTube battery
  • Intelligent eMTB mode to automatically deliver power based on the terrain
  • Dropper seatpost to lower your saddle on the fly, perfect for descending
  • Powerful hydraulic disc brakes for ultimate stopping power

Battery Specifications

  • Maximum Assist: 250w / 75Nm torque
  • Motor Weight: 2.6kg
  • Battery Power: 625wh

Technical Specification

Frame Trek Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, Knock Block, internal routing, Motor Armor, magnesium rocker link, rack and fender mount, ABP, Boost148, 100mm travel
Fork SR Suntour XCR 34, air spring, LO R damper, hydraulic lockout, tapered steerer, 44mm offset, oversized crown for eMTB, Boost110, 15mm bolt-on thru-axle, 120mm travel
Rear Shock SR Suntour Edge R, 190x45mm
Headset FSA IS-2, 1-1/8" top, 1.5" bottom
Stem Bontrager alloy, 31.8mm, Blendr compatible, 7 degree
Handlebar Bontrager alloy, 31.8mm, 15mm rise
Front Brake Tektro HD-M275 hydraulic disc
Rear Brake Tektro HD-M275 hydraulic disc
Brake Levers Tektro HD-M275
Rear Derailleur Shimano Deore M5120, long cage
Shift Levers Shimano Deore M4100, 10-speed
Chain KMC X10, 10-speed
Cassette Shimano Deore M4100, 11-46, 10-speed
Crankset FSA Bosch CK-220, 36T ring
Front Wheel Rim - Bontrager Kovee, double-wall, Tubeless Ready, 32-hole, 23mm width, Presta valve / Hub - Bontrager sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru-axle
Rear Wheel Rim - Bontrager Kovee, double-wall, Tubeless Ready, 32-hole, 23mm width, Presta valve / Hub - Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru-axle
Front Tyre Bontrager LT4 Expert, reflective strip, wire bead, 60 tpi, 29x2.40" clincher
Rear Tyre Bontrager LT4 Expert, reflective strip, wire bead, 60 tpi, 29x2.40" clincher
Saddle Bontrager Commuter Comp, 165mm width
Seatpost TranzX JD-YSP18 dropper, internal routing, 31.6mm
Pedals VP-536 nylon platform
Motor Bosch Performance CX, magnesium motor body, 250 watt, 75 Nm, 25km/h
Ui/Remote Bosch Kiox with Anti-theft solution
Battery Bosch PowerTube 625wh
Accessories Herrmans MR8e, 180 lumens, 60 lux front light, Supernova E3 Mini-2 LED rear light, mudguards, pannier rack, bike stand

Trek Powerfly FS 4 EQ Electric Mountain Bike 2021 Sizing

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