Theory American to Mid Bottom Bracket Cup Set - Aluminum - Purple 53mm while remaining strong

while remaining strong

The Answer BMX Slider Bottom Bracket is one of the most popular and functional bottom bracket kits available in BMX racing

Mount: Center

K-Shield housing provides a higher compressive strength while being lighter than standard stainless steel

integrated seat post clamp

Theory American to Mid Bottom Bracket Cup Set - Aluminum - Purple 53mm while remaining strongThe 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: Purple anodized 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