Shimano bike chainwheels have either a B,S or T after the tooth number. What do...

catslave

New member
...those letters stand for? I am buying a new crankset for my mountain bike. The one I have is a Sr Suntour XCM-T312. The crankring sizes are 42S/32S/22S. I am looking for a replacement and I noticed that the "S" can also be a "B" or "T". What do those letters stand for?
 
Top