Availability: 9 in stock
This Shimano XT SM-RT81 Disc Brake Rotor Centerlock Ring and Washer is intended to affix Centerlock disc brake rotors to Centerlock compatible hubs using an internally splined key pattern for tightening and adjustment. Internally splined rotor lock rings are compatible with cassette locking ring tools; this configuration is also an ideal choice for axles measuring smaller than 12mm in diameter.