This VOLTARC-assembled kit pairs the proven Bafang BBS02B 48V 500W mid-drive motor with a 100mm bottom-bracket spacer set, making it a direct fit for fat bikes and wide-BB frames where the standard 68/73mm unit will not seat correctly. It delivers 100Nm through your drivetrain for confident climbing across sand, snow and loose trails, with both pedal-assist and a full hand/thumb throttle. Includes the BBS02B motor, 100mm spacer kit, lockring spanner, chainring, motor-cut-off brake levers, gear sensor, colour display, PAS sensor and full wiring loom. For off-road / private land use only — not road-legal in the UK. Its 500W rating and full throttle exceed the UK EAPC limits, so use is restricted to private land or off-road with permission.

Bafang BBS02B 48V 500W Mid-Drive Kit with 100mm BB Adapter (Fat Bike)
Not road-legal in the UK — off-road / private land use only. Details
£499.00
Price includes 20% VAT.
Bafang BBS02B 500W mid-drive kit pre-fitted for wide 100mm fat-bike bottom brackets, with full throttle. For off-road / private land use only — not road-legal in the UK.
About this item
- Throttle: Full throttle
- Motor Power: 500W peak
- Motor type: Mid-drive (crank / bottom bracket)
- Rated power: 500W (48V)
- Voltage: 48V
- Torque: 100Nm
- Bottom bracket fit: 100mm BSA (fat-bike adapter included)
In stock — dispatched within 2–3 working days
Free UK delivery on bikes · 30-day returns
| Brand | |
|---|---|
| Throttle | Full throttle |
| Motor Power | 500W peak |
| Motor type | Mid-drive (crank / bottom bracket) |
| Rated power | 500W (48V) |
| Voltage | 48V |
| Torque | 100Nm |
| Bottom bracket fit | 100mm BSA (fat-bike adapter included) |
| Assist mode | Pedal-assist + full thumb throttle |
| UK status | Off-road / private land only — not road-legal |
Not road-legal in the UK
This machine is fitted with a full twist-grip throttle and is not compliant with UK EAPC (Electrically Assisted Pedal Cycle) regulations. It must only be used on private land or a closed circuit with the landowner’s permission. Using it on a public road, cycle path or other public place would require type approval, registration, tax, insurance and a relevant licence.
Riders are responsible for using appropriate protective equipment and complying with local rules.




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