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 Alltrack 4 27.5" Electric Mountain Bike
The Haibike Alltrack 4 27.5" Electric Mountain Bike is an entry-level hardtail eMTB that gives you a powerful boost back up to the top of the hill, so you can have more fun with less effort. Pedalling assistance from the 250W Bosch Performance Line 250-watt motor and 500Wh PowerTube battery is supplied up to 15.5mph/25kph, and the system is neatly stored inside the frame.
The frame itself is constructed from tough aluminium, and this is paired with a 120mm travel SR Suntour fork, which soaks up big hits and bumps for a smoother, more controlled and comfortable ride. A mix of reliable components make up the 9-speed drivetrain and powerful hydraulic disc brakes create consistent stopping power in all conditions.
Haibike's Alltrack uses frame size-specific wheel sizes, and the small and medium offered here are fitted with 27.5" wheels for a good balance of rolling speed and lively handling.
Browse our range of Haibike electric mountain bikes today.
- Haibike aluminium frame
- SR Suntour 120mm travel fork
- Shimano Alivio M3100-mix 9-speed drivetrain and Alhonga hydraulic disc brakes
- Schürmann 27.5" wheels and WTB Ranger Comp tyres
- Bosch Performance Line 250W motor and Bosch PowerTube 500Wh battery
- Battery Weight: 3.0kg (approximate)
- Battery Power: 500Wh
- Charge Time: 4.5 hours
|Fork||SR Suntour, XCM32 Boost DS, Steel spring/oil, aluminium steerer tube 1 1/8" - 1 1/2" tapered, 15 x 110mm thru-axle Boost, 120mm travel|
|Headset||Feimin, A-Head tapered, ball bearing|
|Bottom Bracket||Integrated into the motor|
|Stem||XLC, A-Head, 31.8mm|
|Handlebar||XLC, 720mm width|
|Front Brake||Alhonga HT472, hydraulic disc / Alhonga DXR1806, 180mm rotor|
|Rear Brake||Alhonga HT472, hydraulic disc / Alhonga DXR1806, 180mm rotor|
|Rear Derailleur||Shimano Alivio M3100, 9-speed|
|Shift Levers||Shimano Nexus, 9-speed|
|Chain||KMC e9S 9-speed|
|Cassette||Shimano HG200, 11-36t, 9-speed|
|Crankset||Miranda No.7, steel, 38-tooth steel chainring|
|Front Wheel||Rim - Schürmann, Yak25 with eyelets, hollow rim, aluminium / hub - 6-bolt / spokes - Sapim Leader, black|
|Rear Wheel||Rim - Schürmann, Yak25 with eyelets, hollow rim, aluminium / hub - Alu Nabe, 6-bolt / spokes - Sapim Leader, black|
|Front Tyre||WTB Ranger Comp, 55-584, 27.5" x 2.3" clincher|
|Rear Tyre||WTB Ranger Comp, 55-584, 27.5" x 2.3" clincher|
|Seatpost||XLC, aluminium, patent, 31.6mm|
|Pedals||Freeride pedal, aluminium with reflector|
|Motor||Bosch Performance Line Gen3 60, 250W|
|Battery||Bosch PowerTube 500Wh|
|Electric Assisted Speed Limit||15.5mph / 25km/h|
|Maximum Weight||120kg (combined weight of bicycle, rider and cargo)|