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Trek Powerfly FS 4 500 WH Electric Mountain Bike 2022

★★★★★ ★★★★★
RRP £4,250.00 Save 24%
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Powerfly FS 4 500 WH Electric Mountain Bike 2022
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Product ID: 1314587

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Bike Delivery Options

Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.

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Trek Powerfly FS 4 500 WH Electric Mountain Bike 2022

Take your off-road adventures further with the Trek Powerfly FS 4 500 WH Electric Mountain Bike, a sturdy aluminium steed complete with 250W of assistance at up to 15.5 mph / 25 km/h courtesy of the Bosch Performance CX motor, ideal for providing an extra push on climbs so no route is off-limits. This compact Bosch PowerTube 500 completes a full charge in around four and a half hours and is integrated into the frame for a sleek look, boasting simple, intuitive removal without the need for tools. 

A plush suspension set up with 100mm of travel to the rear and 120mm of front suspension means this bike is more than comfortable on rugged terrain, soaking up bumps for a delightfully smooth ride over any roots or rocks the trail may throw at you, and it features a hydraulic lockout which comes in handy to stop any bobbing up climbs. The Shimano Deore 10-speed drivetrain is always ready for some hard labour, delivering reliable shifting and a range of gears to suit undulating topography, whilst the TranzX dropper seatpost comes in handy to get weight low over the back wheel when sending it downhill. Stopping is stress-free and tackled with precision thanks to the Tektro HD-M275 hydraulic disc brakes, which perform in adverse weather and testing conditions alike. 

Browse our range of Trek electric mountain bikes today.

Battery Specification

  • Max Assist: 250w
  • Motor Weight: 2.9kg
  • Battery Power: Approximately 500Wh
  • Charge Time: 100% charge, 4.5 hours with Standard Charger


  • Trek Alpha Platinum Aluminium frame with RIB
  • SR Suntour XCR 34, air spring fork with 120mm travel
  • Shimano Deore 10-speed components
  • Tektro HD-M275 hydraulic disc brakes
  • Bontrager wheels with 2.30” XR3 Comp tyres
  • TranzX JD-YSP18 dropper seatpost gets the saddle out of the way quickly
  • Bosch Performance CX 250W motor
  • Bosch PowerTube 500 battery

Technical Specification

Frame Trek Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Knock Block, internal routing, Motor Armor, magnesium rocker link, rack and mudguard mount, ABP, Boost148, 100mm of 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 of travel
Rear Shock SR Suntour Edge R, 190x45mm
Stem Bontrager alloy, 31.8mm, Blendr compatible, 7 degree
Handlebar Bontrager alloy, 31.8mm, 15mm rise
Grips Bontrager XR Trail Comp, nylon lock-on
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, 165mm length
Front Wheel Bontrager sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru-axle hub, Alex MD35, Tubeless Ready, 32-hole, 35mm width, presta valve rim
Rear Wheel Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru-axle hub, Alex MD35, Tubeless Ready, 32-hole, 35mm width, presta valve rim
Front Tyre Bontrager XR3 Comp, wire bead, 30tpi, 29x2.30" clincher
Rear Tyre Bontrager XR3 Comp, wire bead, 30tpi, 29x2.30" clincher
Saddle Bontrager Arvada, steel rails, 138mm width
Seatpost TranzX JD-YSP18 dropper, internal routing, 31.6mm
Pedals VP-536 nylon platform
Charge time 100% charge, 4.5 hours with Standard Charger
Motor Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 25km/h
Ui/Remote Bosch Purion
Battery Bosch PowerTube 500
Charger Bosch standard 4A (220-240 V) charger
Electric assisted speed limit 15.5 mph / 25 km/h

Built, Checked, Tuned and Tested

All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.

All bikes collected from our shop, are built, tested and ready to ride. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service

Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.

If you require any assistance please contact our Customer Care team.

Trek Powerfly FS 4 500 WH Electric Mountain Bike 2022 Sizing

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