Wolf Tooth Direct Mount Chainring Bosch Motor 32T Drop Stop B E-Bike

The chainrings are compatible with all Boost and Super Boost bikes that use Bosch Gen 4 e-bike motors. 55mm chainline. The Drop-Stop B tooth profile is compatible with nearly all 9-, 10-, 11-, and 12-speed chains, including SRAM Transmission T-types. The Drop Stop ST tooth profile is compatible with Shimano HG+ 12-speed and KMC 12-speed chains. Made in the USA.