The Bafang M620 ‘Ultra’ is the most powerful unit in Bafang’s integrated crank-drive line-up and a cult favourite among hard-core builders. It combines a torque sensor, speed sensor and cadence sensor for sophisticated power delivery, with a heavy-duty internal gearset rated to a massive 160Nm — enough to haul the steepest, loosest off-road climbs. This VOLTARC build supplies the Ultra as a high-output off-road unit with a full throttle and de-restricted firmware. For off-road / private land use only — not road-legal in the UK. With 160Nm of torque, full throttle and de-restriction it sits well outside the UK EAPC limits and must only be ridden on private land or off-road with permission. Supplied with the M620 Ultra mid-motor, torque-sensing bottom bracket, colour display and wiring loom for integration into a compatible Ultra frame.

Bafang M620 Ultra 48V Crank-Drive OEM Unit
Not road-legal in the UK — off-road / private land use only. Details
£800.00
Price includes 20% VAT.
The legendary Bafang M620 Ultra crank-drive, 160Nm torque-sensing mid-motor for extreme builds. For off-road / private land use only — not road-legal in the UK.
About this item
- Throttle: Full throttle
- Motor Power: 1000w Peak
- Motor type: Mid-drive crank unit (M620 Ultra OEM)
- Torque: 160Nm
- Voltage: 48V / 52V compatible
- Sensors: Torque + speed + cadence
- Bottom bracket fit: 120mm BSA / frame-integrated (Ultra mount)
In stock — dispatched within 2–3 working days
Free UK delivery on bikes · 30-day returns
| Brand | |
|---|---|
| Throttle | Full throttle |
| Motor Power | 1000w Peak |
| Motor type | Mid-drive crank unit (M620 Ultra OEM) |
| Torque | 160Nm |
| Voltage | 48V / 52V compatible |
| Sensors | Torque + speed + cadence |
| Bottom bracket fit | 120mm BSA / frame-integrated (Ultra mount) |
| Assist mode | Pedal-assist + full throttle (de-restricted) |
| 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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