- Replacement freewheel lockring to fit Crewkerz AS30 cranks.
- High quality aluminum construction.
- Fitted for a Shimano Hollowtech 2 style bottom bracket tool such as the Park BBT-9.
- When installing, the small lip side should be facing the bb bearing.
- Also fits Crewkerz rear hubs as a cog lockring.
- Anodized red finish.
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