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.
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.
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.
Manufacturer Warranty
All e-bikes sold by VOLTARC come with the full manufacturer's warranty. Coverage typically includes:
Frame & Fork — 2–5 years against manufacturing defects
Motor & Battery — 2 years (capacity guarantee: ≥60 % after 500 charge cycles)
Electrical components — 1–2 years
Consumables (brake pads, tyres, chain) — not covered
How to make a claim
Email support@e-bikes.biz with your order number and a description of the issue. We aim to respond within 1 business day.
Extended Support
VOLTARC offers optional 3-year extended cover for an additional fee. Ask us at checkout.
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No. EAPC (Electrically Assisted Pedal Cycle) e-bikes are legal on UK roads without a licence, insurance, or registration, provided the motor assists only while pedalling and is limited to 250 W / 15.5 mph.
Range depends on the battery size, rider weight, terrain, and assist level. Check the specific product specification for its stated range; typical figures are 40–120 miles per charge.
Most batteries charge in 3–6 hours from flat using the supplied charger. Fast-charge options (where available) can halve this time.
Yes. Our bikes carry an IP rating (see spec tab) and are designed for UK weather. Avoid submerging the battery or motor. Dry and lightly oil the drivetrain after wet rides.
14-day hassle-free returns on unused bikes in original packaging. For faulty bikes we will arrange a free collection. See our returns page for full details.
Finance is not yet available at checkout — it's planned for a future release. See our Finance page for the latest status and to register your interest.
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