Shimano FC-R9100 54T-MX Chainring

Shimano FC-R9100 54T-MX Chainring For fast, flat riding and time trialling, Shimano’s FC-R9100 54T-MX Chainring offers a high ratio option that will allow for more speed. It is compatible with their premium Dura-Ace four-arm chainsets and should only be used alongside a 42-tooth inner ring to allow for perfect shifting between the rings.