Your Fit Kit extends the useful life of both your bottom bracket and your cranks, it reduces the potential for noise, and it also allows you to use one bottom bracket with a wide array of cranks, if that’s your jam.
Fit Kit #3 (PBB083) for ThreadFit™ 30 with 30mm spindle cranksets.
For use with ThreadFit™ 30
68mm, 73mm BB shells.
Common Cranks: White Industries, SRAM, Race Face