The ROTOR Shimano Chainring Bolts for Dura Ace, Ultegra and 105 ROTOR Shimano Coverbolts. Specially made for the 4-arm Shimano cranks. They are blade bolts that connect perfectly to the Shimano spider. It looks a lot nicer with this. Material: hardened aluminum (7075), CNC machined COMPATIBILITY The Dura Ace 9200 version is compatible for: Shimano R9200, R9210, R9250Di2, R9270-P-Di2 The Dura Ace 9100 version is compatible for: Shimano R9100, R9110, R9150Di2 The Ultegra 8000 version is compatible for: Shimano R8000, R8020, R8050Di2 The Ultegra 8100 version is compatible for: Shimano R8100, R8100-P, R8150Di2, R8170Di2, R8170-P-Di2 The 105 7100 version is compatible for: Shimano R7100, R7100Di2 R7150Di2, R7170Di2
