SpeedBox 3.1 is a third-generation unbridling module designed for electric bikes fitted with Bafang Max Drive M300, M400 or M420 motors with 4-pin connectors. It removes the 25 km/h assistance limit, offering assistance up to higher speeds (around 35 km/h). Unlike the Bluetooth versions, this classic version does not require a mobile app, and offers activation/deactivation via the bike's controls.
Highlights
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Remove assistance limit: Eliminates the 25 km/h restriction.
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Activation/deactivation via bike: Use the bike's existing buttons to control the module.
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Actual data display: Current speed, maximum speed, average speed, mileage and range displayed correctly.
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Simple installation: original connectors for plug & play installation without modifications.
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No application required: Works independently of a mobile application.
Technical specifications
Specification |
Detail |
Type of use |
Tuning e-bike Bafang Max Drive M300 / M400 / M420 (private use recommended) |
Engine compatibility |
Bafang Max Drive M300 / M400 / M420 with 4-pin connector |
Screen compatibility |
System-compatible Bafang screens |
Activation/Deactivation |
Via bike buttons (e.g. LIGHT button or button sequence) |
Activation indication |
99 km/h display briefly |
Indication of deactivation |
Display 25 km/h briefly |
Recommended max. speed |
Unlimited (≈ 35 km/h recommended) |
Actual speed display |
Yes |
Correct distance |
Yes, after the countdown at the end of the journey |
Installation |
Plug & play with original connectors |
Practical notes |
Do not switch on/off while riding; leave the bike powered up to 0.0 km/h before switching off. |
Incompatibilities |
Not compatible with standard sensor (not 4-pin), ABS systems |