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 Sport 4 EQ Electric Mountain Bike 2021
Multi-faceted, capable and versatile, the Trek Powerfly Sport 4 EQ Electric Mountain Bike is something of an all-rounder, ready to give a boost should it be needed. The Bosch Performance CX motor lends up to 250w of assistance at up to 15.5 mph / 25 km/h, kicking into action to alleviate tough climbs or speed up the commute, whilst the Bosch PowerTube 500 battery is integrated into the frame for a clean aesthetic. Should it need to be removed, this can be done intuitively and without any need for tools. The SR Suntour XCM suspension fork with 80mm of travel smooths surfaces for enhanced comfort over rougher terrain and can be locked out when road riding to avoid irritating bobbing.
Tektro HD-M275 hydraulic disc brakes perform consistently with rapid stopping power whatever the weather and 1x10-speed Shimano Deore components provide an effective gear range, taking care of shifting with reliable consistency. The addition of a rack, mudguards, kickstand and battery-powered light elevates this eMTB to new heights when it comes to practicality - ideal for touring trips, trail rides or taking the longer route to work just to enjoy some off-road freedom.
Browse our range of Trek electric mountain bikes today.
Highlights
- Trek Alpha Platinum Aluminium frame with RIB
- SR Suntour XCM 34 fork with 80mm of travel
- Shimano Deore 1x10-speed drivetrain
- Tektro HD-M275 hydraulic disc brakes
- Bosch Performance CX 250W motor
- Bosch PowerTube 500 battery
- Mudguards, kickstand, rack and light
- 29˝ wheels on larger frames, 27.5˝ wheels on smaller frames
Technical Specification
| Frame | Trek Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148, 12mm thru-axle |
| Fork | SR Suntour XCM 34, coil spring, preload, lockout, tapered steerer, 44mm offset, Boost110, 15mm thru-axle, 80mm travel |
| Headset | FSA IS-2, 1-1/8" top, 1.5" bottom |
| Stem | Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 80mm length |
| Handlebar | Bontrager alloy, 31.8mm, 15mm rise, 720mm width |
| Grips/Bar Tape | Bontrager XR Endurance Comp, lock-on |
| Front Brake | Tektro HD-M275 hydraulic disc, 203mm rotors |
| Rear Brake | Tektro HD-M275 hydraulic disc, 203mm rotors |
| Brake Levers | Tektro HD-M275 hydraulic disc |
| 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 | Formula DC-511, 6-bolt, Boost110, 15mm thru-axle hub, Bontrager Connection, double-wall, 32-hole, 20mm width, Presta valve rim |
| Rear Wheel | Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru-axle hub, Bontrager Connection, double-wall, 32-hole, 20mm width, Presta valve rim |
| Front Tyre | Bontrager LT4 Expert, reflective strip, wire bead, 60 tpi, 27.5/29x2.40" clincher |
| Rear Tyre | Bontrager LT4 Expert, reflective strip, wire bead, 60 tpi, 27.5/29x2.40" clincher |
| Saddle | Bontrager Commuter Comp, 165mm width |
| Seatpost | Bontrager alloy, 31.6mm, 12mm offset, 400mm length |
| Pedals | Trek VP-536 nylon platform |
| Accessories | Trek Powerfly custom integrated rack mounts, AXA Blueline taillight, Pletscher Comp Flex 18 kickstand, MIK Compatible alloy rear rack |
| Charge time | 100% charge, 4.5 hours with Standard Charger |
| Motor | Bosch Performance CX, magnesium motor body, 250 watt, 75 Nm, 25km/h max assist |
| Ui/Remote | Bosch Purion |
| Battery | Bosch PowerTube 500 |
| Charger | Bosch compact 2A (100-240 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.
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.