12S MS Cassette Lockring CNC Fit Shimano XT/SLX/Deore CS-M9100/M8100/M7100/M6100
Bicycle 12 speed flywheel lock cover MS flower drum main body suitable for SHIMANO M7100 8100. CNC precision machining, deepening grooves, better fitting with cutting tools, better stress, and less prone to slipping.