SHIMANO SM-RT81 LOCK RING &WASHER - SoCal Bike - Oceanside, Carlsbad and north San Diego county's favorite bike shop, Bicycle and ebike rentals, sales, and service
1 or 2 Shimano XTR SM-RT99-XT SM-RT81 Center Lock Disc Brake Lock Ring W/Washer | eBay
Shimano Deore XT SM-RT81 Disc Rotor – Rock N' Road