SHIMANO XT HB-M8010 DISC ROTOR LOCK RING
LOCK IT UP
Centerlock rotors don't use rotor bolts, they use a lock ring instead. The Shimano XT HB-M8010 Disc Rotor Lock Ring has outer serration and is designed to work with 12, 15, and 20mm axle hubs. They are sold individually.
For use with 12, 15, and 20mm axle hubs