Ring gear steel for BMW S1000RR 2009/2012 43 525

The change of your ring gear will allow you to gain speed thanks to a crown with fewer teeth than original or a gain of acceleration thanks to a crown with more teeth than original.

Attention, by changing the number of teeth of your crown you will imperatively change the size of your pinion.

If you do not know the original size of your ring gear, do not hesitate to contact us by email or phone, our advisors can guide you.