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Mountain Disc Brake Rotors

Shimano SM-RT81 Disc Rotor Lock Ring

OE replacement lockring for all Shimano standard and Ice Tech Center Lock rotors. Replaced worn or damaged lockrings with factory fresh replacements. Lightweight alloy lockring has smooth threads and an embedded washer for added security.


  • Anodized alloy construction
  • Shimano Part: Y8K198010
  • Made in Japan