The Piston Interlock BB86 bottom bracket system uses a 2 piece thread-together cup system which prevents the bearings from being incorrectly or unevenly loaded. The internal bearings keep out grit and moisture and the aluminum housing is tough and durable. Piston uses high-quality, precision bearings that will have you spinning with ease.

Compatible with frames that use a BB86 (41mm id) bottom bracket shell.
Suitable for 2 piece cranks Shimano type 24mm through spindles.


*Requires Hollowtech II style bottom bracket tool for installation.