This durable chainring comes in 34T, 36T, 38T and 40T sizes utilising proven narrow-wide technology for optimised chain retention. Designed for Bosch BDU37/31-equipped e-bikes (Gen4) and compatible with Shimano 10-/11-speed drivetrains. The precision 53mm chainline delivers outstanding drivetrain efficiency and is ideal for e-bikers who want to elevate their bike's performance to the next level.