Adapts American/Pro BMX frames with a non-threaded 51.3mm (2.02") ID bottom bracket shell to accept English-threaded bottom bracket & crank applications
- CNC machined aluminum with 3 steel connecting bolts to prevent independent rotation
- American to Euro Cup Conversion Kit for BMX or "Ashtabula" Bottom Brackets
- Allows installation of English threaded cups in many BMX and older American made full-size bicycles
- Saves weight, improves shifting, and allows the use of modern clipless pedals