Theory American Bottom Bracket Cups (Silver)

The Theory American BB cups allow you to use any sealed Mid BB (19, 22 or 24mm) in any American bottom bracket frame. If you have a frame with an American BB shell, it can be difficult upgrading your crankset or even finding a replacement BB kit. These Theory American cups should help solve your issue. Sold in pairs.

This product was added to our catalog on February 16, 2023