simple...
Very few frames, except Italian brands (but not BianchI) and Merckx use Italian threaded BBs. Undoubtedly, you need an English threaded BB. The spindle length is determined by your choice of crank, not the frame. If the right hand side has left hand threads, then it's English for sure.
The two links below have all the info you could ever want. SAVE them for future use.
http://www.parktool.com/repair/readhowto.asp?id=94
http://www.sheldonbrown.com/bbsize.html#shimano
Very few frames, except Italian brands (but not BianchI) and Merckx use Italian threaded BBs. Undoubtedly, you need an English threaded BB. The spindle length is determined by your choice of crank, not the frame. If the right hand side has left hand threads, then it's English for sure.
The two links below have all the info you could ever want. SAVE them for future use.
http://www.parktool.com/repair/readhowto.asp?id=94
http://www.sheldonbrown.com/bbsize.html#shimano
