Replacement lock ring & spacer for Shimano 12-speed XT CS-M8100 and SLX CS-M7100 12-speed cassettes (Y0GY98010).
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Compatibility:
- XT CS-M8100 10-45T
- XT CS-M8100 10-51T
- SLX CS-M7100 10-45T
- SLX CS-M7100 10-51T
- Deore 12s CS-M6100 10-51T
- Also compatible with XTR CS-M9100 but part differs in materials & finish
- Shimano part Y0GY98010