Theory American to Mid Bottom Bracket Cup Set - Aluminum - Dark Blue Sz 11.5 This has a chrome plated

This has a chrome plated finish and is not stamped (Tange BB's have not been stamped for several years now)

Each bottom bracket is hand assembled using a hollow chromoly spindle

Multi-Butted

with very little friction for a free-spinning bearings

Stem: Reid A head

Theory American to Mid Bottom Bracket Cup Set - Aluminum - Dark Blue Sz 11.5 This has a chrome platedThe Theory Bottom Bracket Cups allow you to use a mid size sealed bearing bottom bracket in an American size frame. They are made out of anodized 7000 series aluminum. These are made to fit 50. 8mm frames and 41. 2mm OD bearings. Color: Dark Blue Note: This part was colored by anodizing, which is a method of coloring metal. Color differences do occur among manufacturers and even among batches from the same manufacturer. This is not a flaw or