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 February 16, 2023