Bosch 20 teeth chainring for the e-bike drive unit Active &, Performance Line from 2014.
How to replace the Bosch chainring / sprocket on the Bosch Active / Performance motor?
- To change the chainring you need the following tools.
- Crank puller and Bosch spider / lockring tool.
- To replace the Bosch chainring, you may also need the Bosch lockring incl. sealing ring.




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