At the time of replacing the sprocket, simultaneous exchange with the drive chain is the basic.

If three points of the front / rear sprocket and the chain are not exchanged at the same time, it will lead to shortening of the product life due to knitting wear.
We recommend this "3 point simultaneous exchange."

DID Chain  Lineup RK Chain  Lineup      XAM Chain Lineup
XAM Chain Spec Table