Originally Posted by
dave1959
Are Cranksets interchangeable ? Or do I need to look for something specific ??
What happens if I change the tooth count..??? Does this just change gear ratio's,
Cranksets - and bottom brackets - come in several different versions. At least half a dozen.
Some will mount right up to your current BB, other will require a new BB too. Some may require a BB your frame can't take.
Easiest path is to look for one matching your current BB and tooth count.
The importance of tooth count depends.
Sometimes a bigger won't clear the chainstay.
Also, the curve of the front shifter is shaped to fit a certain range of tooth counts. Stray too far from the intended use and shifting may suffer.