BBB BCR 70E E bike Sprocket (18T, Bosch, Boost Option)

Hardened steel for longer durability Optional chainline offset of 2.5mm for Boost 148mm Lock ring included Sizes: 14t, 15t, 16t, 17t, 18t, 19t and 20t Compatible withL 8, 9, 10 and 11-speed e-Bike specific: This product complies to the NEN-EN 15194:2017 regulations for e-bikes