Shimano XT HB-M8010 Centerlock Ring and Washer

No, this specific lockring is designed exclusively for 15mm and 20mm thru-axle front hubs. If you are using a standard quick-release hub, you will need a different style of lockring that accommodates the smaller axle diameter.

Yes, you will need a standard external-notch bottom bracket tool or a dedicated cassette lockring tool to tighten this component properly. These tools engage with the splines on the lockring to ensure you can reach the correct torque specifications.

The kit includes both the lockring and the necessary washer. You will need to use both components to ensure the rotor is spaced correctly and secured firmly against the hub.

This specific lockring is engineered for front thru-axle hubs. While some centerlock systems share similar threading, rear hubs often require a different lockring design, especially if they use a quick-release skewer or a different axle standard.

The washer acts as a critical interface between the lockring and the rotor. It prevents the lockring from galling the surface of the rotor during installation and helps maintain consistent tension, which is vital for preventing the rotor from loosening under heavy braking.