SpeedBox 3.0 for Bafang M300 / M400 (3-pin connector) is a de-restriction module for electric bikes fitted with Bafang Max Drive M300 or M400 motors with 3-pin speed sensor. It removes the 25 km/h assistance limit, enabling you to ride at much higher speeds (depending on your physical condition, wheels, gradient, etc.).
Activation and deactivation are performed via the bike's LIGHT button or via the key combination ↑↓↑↓. When SpeedBox is activated, the display briefly shows 99 km/h to signal that the restriction has been lifted. To return to the normal limit, simply repeat the operation.
Highlights
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Removal of the 25 km/h assistance limit.
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Free adjustment of maximum assistance speed.
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Real data display: instantaneous speed, average speed, mileage, range correctly displayed.
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Quick activation/deactivation via LIGHT or key sequence.
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Simple installation: colored connectors, plug & play assembly.
Technical specifications
| Specification |
Detail |
| Type of use |
Bafang electric bike tuning (private use / private land recommended) |
| Engine compatibility |
Bafang Max Drive M300 and M400 with 3-pin connector |
| Screen compatibility |
Compatible standard displays (not with UART connectors) |
| Activation / deactivation |
LIGHT button or key sequence ↑ ↓ ↑ ↓ |
| Activation indication |
99 km/h displayed briefly to indicate that the limit has been lifted |
| Adjustable maximum speed |
Unlimited / according to user settings |
| Actual speed display |
Yes, even after activation |
| Installation |
Plug & Play, coded connectors |
| Not compatible |
Bafang M420, M500 motors; displays with UART connectors |
| Notes on legality |
Ordinary: use on public roads may be illegal; manufacturer's warranty may be voided |
