NEW – Shimano Alfine S501 39T Chainring, 130BCD, 9spd, Single
This chainring is designed to be used on the Shimano Alfine S501 crankset and both the inner and outer chainring guards. This chainring has special holes drilled in it to accept the inner chainring guard. Because the Alfine uses a 1x setup for the front chainring there is no need for ramps or shift pins 130mm BCD39 teeth9 speedSingle-ring use