but what is the bearing/cup diameter? I noticed that conversion kit I like is threaded so I belive it may be what i call a euro bb... but even if it is, is there a american to conversion kit? i know they make american to mid or spanish bb for bmx but like I said im pretty limited to bmx as far as my more than basic bike knowledge goes. Im pretty mechanically savy given I work on cars too but I lack the dimension/size knowledge i need to finish what I got started.