Theory American Bottom Bracket Cups (Pink)

Theory American BB Cups Description:

The Theory American Bottom Bracket 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 July 17, 2025