The non-drive side (left side) on the English standard is a right hand threading, tightening clockwise. The drive side (right side of the bike) uses a left hand thread, tightening counterclockwise. ... These are: BSA, BSC, BC, ISO, British, and Euro, the name used in BMX bike circles.

Is BSA same as English?

These days, BSA, ISO, and English are used interchangeably to refer to what is now considered to be a standard threaded bottom bracket shell or bottom bracket.

What is a BSA threaded bottom bracket?

BSA. The BSA and Italian thread bottom bracket shells are predominantly something you find on bikes made before 2010. These two types of bottom brackets are the so-called threaded bottom brackets, which feature a thread on both sides of the shell. A frame with a BSA fit is incredibly commonplace.