SpecificationsSize (Mass +/-1g): 71g (12T/18T) Color: Lower lockring: PVD Rainbow, Black, Titanium, Red, Gold Compatibility: Shimano Dura Ace 9100 / 9150 / 9170 , Ultegra 8000 / 8050. Fits up to 32T cassette. NOT compatible with Ultegra long GS cage derail
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