Used to adjust crank chainline or take up any slack when using 30mm, 24mm (Shimano, FSA, etc.) or 24/22mm (SRAM/TruVativ) Spindle Cranks in any BB30/PF30/BB86/92 or similar crank system.
- 24mm I.D. for use with cranks like Shimano HollowTech II, GXP, FSA
- 30mm I.D. for use with BB30 cranks
- Machined engineering-grade Delrin.