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.
We've partnered with Pedalsure to offer you 30-DAYS FREE bike insurance on new bikes over £400. Visit our Cycle Insurance page to learn more and claim.
Trek Powerfly FS 4 EQ Gen 2 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.
Browse our range of Trek electric mountain bikes today.
- 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
- Maximum Assist: 250w / 75Nm torque
- Motor Weight: 2.6kg
- Battery Power: 625wh
|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|
|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.
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.