Shimano Spares SM-RT900 lock ring and washer –

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Shimano SM-RT900 lock ring & washer - Just Riding Along

Shimano Spares SM-RT81 internal lock ring and washer –

Shimano Dura-Ace SM-RT900 Rotor - Centerlock - Components

SHIMANO CENTER LOCK Disc Brake Rotor ICE TECHNOLOGIES FREEZA 160/140 mm

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It provides even pressure across the disc rotor so it's less likely to warp due to uneven torque and it's simply faster and easier to install and remove. The XT M8010 Centerlock Rotor Lockring is perfect to keep in the toolbox just in case you might need it on a trip. The lockring is compatible with 12 15 and 20mm axles and Centerlock rotors and requires an external BB tool to torque the lockring to the hub.

Shimano XT M8010 Centerlock Disc Rotor Lockring

Bike Bicycle Centerlock Disc Brake Rotor Lockring For-Shimano Deore XTR XT SLX Middle Lock Disc

Shimano XTR/Saint RT-MT900 Ice Technologies Freeza Centerlock disc rotor internal lock ring magnet LordGun online bike store

Rotors, Brakes and accessories Bike components - OMNI Bikeparts

Shimano Disc Brake Rotors

SHIMANO DURA-ACE LOCKRING LOCK RING AND WASHER 9/12MM : Sports & Outdoors

SHIMANO DURA-ACE LOCKRING LOCK RING AND WASHER 9/12MM : Sports & Outdoors

Cassette Lock Ring, 11 Tooth - bicycle parts - by owner - bike sale - craigslist

Shimano Dura-Ace SM-RT900 Disc Brake Rotor Lock Ring and Washer - Angry Catfish