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.
Save up to 47% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.
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.
We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.
Trek Powerfly FS 4 Electric Mountain Bike 2020
The Trek Powerfly FS 4 Electric Mountain Bike uses Bosch’s Performance CX 250W motor to add assistance up to 25kph, with four modes that can be selected on the fly from the handlebar remote. Turbo - 340%, Tour - 140%, Eco - 60% and eMTB which intelligently adds between 140-340% depending on the conditions. The 500Wh battery is mounted in the downtube, leaving room for a bottle cage, and is removable without tools for easy in-house charging.
Aside from the motor, the bike features an Alpha Platinum Aluminium frame and SR Suntour XCR 34 fork, both with 130mm travel for better off-road comfort and control. The 2.35" tyres add traction and cushioning, with the 27.5” wheels keeping the handling nimble. Tektro HD-M275 hydraulic disc brakes relish wet weather and mud, giving predictable stopping power in all conditions whilst the ever-reliable Shimano Deore drivetrain makes gear selection intuitive.
Highlights
- Trek Alpha Platinum Aluminium frame with R.I.B and 130mm of travel
- SR Suntour XCR 34 fork with 130mm of travel
- Shimano 10-speed Deore groupset
- Tektro HD-M275 hydraulic disc brakes
- 27.5” wheels with 2.35” tyres
- Bosch Performance CX 250W motor and 500Wh removable battery
Technical Specification
| FRAME | Trek Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Knock Block, Control Freak internal routing, Motor Armor, magnesium rocker link, Mino Link, ABP, Boost148, 130mm travel |
| FORK | SR Suntour XCR 34, air spring, LO R damper, hydraulic lockout, tapered steerer, 44mm offset, Boost110, 15mm bolt-on thru-axle, 130mm travel |
| REAR SHOCK | RockShox Deluxe RL, 205x50mm |
| STEM | Bontrager Rhythm Comp, 31.8mm, Knock Block, 0 degree |
| HANDLEBAR | Bontrager alloy, 31.8mm, 15mm rise |
| FRONT BRAKE | Tektro HD-M275 hydraulic disc |
| REAR BRAKE | Tektro HD-M275 hydraulic disc |
| FRONT DERAILLEUR | N/A |
| REAR DERAILLEUR | Shimano Deore M6000, mid cage, 42T max cog |
| SHIFT LEVERS | Shimano Deore M6000, 10-speed |
| CASSETTE | SunRace, 11-42, 10-speed |
| CRANKSET | FSA 310, 15t with chain guard |
| FRONT WHEEL | Formula DC-511, 6-bolt, Boost110, 15mm thru-axle rim with Bontrager Connection, double-wall, 32 hole, 20mm width, Presta valve |
| REAR WHEEL | Formula DC-511, 6-bolt, Boost110, 15mm thru-axle rim with Bontrager Connection, double-wall, 32 hole, 20mm width, Presta valve |
| FRONT TYRE | Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.35" clincher |
| REAR TYRE | Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.35" clincher |
| SADDLE | Bontrager Arvada, steel rails |
| SEATPOST | Bontrager alloy, 31.6mm, 12mm offset |
| BATTERY | Bosch PowerTube, 500Wh |
| CONTROLLER | Bosch Purion |
| MOTOR | Bosch Performance CX, 250W, 75Nm, 25kph max assist |
| WEIGHT LIMIT | 136kg (bike, rider and cargo) |
| 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.
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