BBB E-Bike Sprocket with Boost Adapter Bosch Gen 2 Grey Blue BCR-70E

BBB E-Bike Sprocket with Boost Adapter Bosch Gen 2 Grey Blue BCR-70E BBB E-Bike Sprocket with Boost Adapter Grey Blue BCR-70E. Hardened steel sprocket for longer durability, includes lockring. Availabie in 14, 15, 16, 17, 18, 19, 20T.