Shimano XT CS-M8000 11-Speed Cassette Lockring for 11t Cog. MPN: Y1RK98010 - Shimano - Cassette Lock Rings - Cassette Lockring. Shimano Cassette Lock Rings. We are out East at 3063 Columbia Ave. - Lancaster PA, 17603 & out West at 3225 Grande Vista Dr. - Newbury Park, CA 91320 & 165 Design Place, #105 - Sparks, NV, 89441.
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