Big City Bruiser Bros

No, USA BB is much bigger. Mid used to be USA BBs with alu cups to alow for different size cartridge bearings for 22mm and 19mm spindles but then frame companies started producing smaller BB shells for pressfit bearings e.g Mid and spanish BBs.

Basically if your frame is USA BB you can use the wonder cups to make it Euro/English thread, if it's Mid you'll have to use a Mid BB

That post was probably longer than it needed to be

harumph.

maybe i can get something made