Speedbox 1.4 for Bosch SX (Smart System + Rim Magn

SpeedBox 1.4 for Bosch Performance Line SX (4th Gen) Simplified installation—no need for a separate magnet simulator. Designed for BDU3142 and BDU3143 motors mounted with two top screws. Enables unlimited speed (max 35 km/h recommended). Activation via WALK button or - + - + combination. Tuning status indicated by 3.5/2.5 km/h display values. Compatible with Bosch Rim Magnet setups only. Not compatible with standard magnets, ABS systems, or SpeedBox App. Note: Real speed not shown; correct distance appears after countdown. Check motor space and magnet type before purchase.