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.
Haibike HardSeven 4 Electric Mountain Bike 2022
Robust and reliable, the Haibike HardSeven 4 Electric Mountain Bike is a perfect entrance into the world of assisted cycling. With agile geometry and a powerful Bosch Performance Line motor, it excels on singletrack, cycle paths and more, offering excellent performance for its price point.
The 27.5” wheels are quick to accelerate and easy to manoeuvre, and the reliable Shimano drivetrain provides a wide range of gears and crisp shifting. A Suntour XCM32 suspension fork reduces fatigue on choppy terrain, and the Bosch PowerTube 400Wh battery provides a wide range for mid-length rides.
Browse our range of Haibike electric mountain bikes today.
- Reliable Bosch Performance Line motor system with 65Nm of torque, 25km/h maximum assistance
- The robust and durable aluminium frame is lightweight and stiff
- Bosch PowerTube 400Wh battery sees a high-capacity for increased mileage
- SR Suntour XCM32 Boost DS with 120mm of supple suspension travel
- Shimano Alivio drivetrain offers reliable 9-speed performance
- Powerful Tektro hydraulic disc brakes
- 27.5” wheels offer increased manoeuvrability
- Maximum Assist: 250w / 65Nm torque
- Motor Weight: 2.9kg
- Battery Power: 400Wh
|Frame||Haibike, HardSeven Gen3 Intube, aluminium 6061|
|Fork||SR Suntour, XCM32 Boost DS, steel spring/oil, 120mm, Aluschaft 1 1/8 - 1 1/2" tapered, 15 x 110mm thru-axle Boost|
|Stem||XLC, Alu, A-head|
|Grips||Haibike, MTB grips|
|Handlebar||XLC, Topflat, 720mm|
|Front Brake||Tektro M275, 180mm, 2-piston, hydraulic disc|
|Rear Brake||Tektro M275, 180mm, 2-piston, hydraulic disc|
|Brake Levers||Tektro M275|
|Rear Derailleur||Shimano, Alivio M3100, 9-speed|
|Shifter||Shimano, Alivio M3100, 9-speed|
|Cassette||SunRace CSM90, 11-36t|
|Crankset||Haibike, forged, aluminium|
|Front Wheel||Rim - Schürmann, Yak25, with eyelets, hollow rim, aluminium / Hub - Haibike, Alu Nabe, 6-bolt standard|
|Rear Wheel||Rim - Schürmann, Yak25, with eyelets, hollow rim, aluminium / Hub - Haibike, Alu Nabe, 6-bolt standard|
|Front Tyre||Impac Smart Pac, 57-584, 27.5" x 2.25", clincher|
|Rear Tyre||Impac Smart Pac, 57-584, 27.5" x 2.25", clincher|
|Seatpost||XLC, Aluminium, 31.6mm|
|Motor||Bosch, Performance Line, 250W, 65 Nm, 25 km/h|
|Battery||Bosch PowerTube 400Wh|
|Electric assisted speed limit||15.5 mph / 25 km/h|