Speedbox 1.1 Upgrade Chip fits Bafang Max Drive eBikes (4 pin connector)

Speedbox 1.1 Upgrade Chip for Bafang Max Drive eBikes Unlock the speed limit of your electric bike with a Bafang SpeedBox tuning dongle. Unleash the full speed of your ebike engine and ride it like a derestricted e-bike should be! • Works with any ebike fitted with a Bafang Max Drive motors including; M300, M400, M420 • Fitted to the motor in minutes for a true plug & ride experience • Increase your eBike's max assistance speed up to 50kmh • Display shows half values when active • Don't just take our word for it, scroll to the bottom and read the amazing reviews from other eBike riders. • Please note: Not compatible with 2016-2019 Bafang motors.