Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
Cyclescheme can save you up to 39% on a bike and accessories. Visit our Cycle to Work Scheme page to learn more and claim.
Trek Powerfly FS 4 625 WH Electric Mountain Bike 2021
Rugged and ready for off-road explorations, the Trek Powerfly FS 4 625 WH Electric Mountain Bike is a burly aluminium steed complete with a bump-smoothing suspension set up and a long-range battery to power the most epic rides. The Bosch Performance CX motor provides up to 250w of assistance at up to 25km/h, ideal for sailing up climbs with an extra kick to conquer daring routes with serious elevation. The Bosch PowerTube 625 battery slots neatly into the downtube and can be removed without the need for tools for simplified charging, as well as completing a full charge in a little under five hours.
120mm of front suspension is provided by the SR Suntour fork, with 100mm of rear travel serving to soak up bumps and shocks for a smooth ride over rough, rugged terrain. 10-speed Shimano Deore components shift swiftly and provide enough gearing options to keep the legs spinning as gradients ramp up, whilst Tektro HD-M275 hydraulic disc brakes handle stopping duties with certainty. Utilise the TranzX dropper seatpost on sweeping bends and rapid descents to shift weight back and low over the rear wheel.
- Max Assist: 250w
- Motor Weight: 2.9kg
- Battery Power: Approximately 625Wh
- Charge Time: 100% charge, 4.9 hours with Standard Charger
- Trek Alpha Platinum Aluminium frame with RIB
- SR Suntour XCR 34, air spring fork with 120mm of travel
- Shimano Deore 10-speed components
- Tektro HD-M275 hydraulic disc brakes
- 29” wheels with 2.30” Bontrager XR3 Comp tyres
- TranzX JD-YSP18 dropper seatpost gets the saddle out of the way quickly
- Bosch Performance CX 250W motor
- Bosch PowerTube 625 battery
|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, 4.9 hours with Standard Charger|
|Motor||Bosch Performance CX, magnesium motor body, 250 watt, 75 Nm, 25km/h|
|Battery||Bosch PowerTube 625|
|Charger||Bosch standard 4A (220-240 V) charger|