SpeedBox 1.3 B.Tuning for Bosch Smart System Gen 4 + Rim Magnet

The rim magnet solution. If your Bosch Smart System bike uses a rim magnet instead of a spoke magnet, the standard SpeedBox 1.1 won't work — the 1.3 B.Tuning is built exactly for it. Removes the 25 km/h limit with Bluetooth and full SpeedBox App support: real speed in-app, adjustable limits, invisible tuning and over-the-air updates.

Compatible with: Bosch Performance Line CX and CX Race Gen 4 Smart System motors with rim magnet — motor models BDU374Y and BDU376Y. Check your motor model in the Flow app or ask us to confirm before ordering.

Keyed connectors, reversible install, lifetime functionality warranty. Fitted while you wait at the Grace and Pace workshop, Alphington.

Important: private property use only — a tuned e-bike must not be ridden on public roads, paths or trails in Australia. Tuning may affect your bike manufacturer's warranty. The rider is responsible for complying with all applicable laws.