Originally Posted by
Homebrew01
I must be mssing something. How do you get better ratios by having the same diameter chainring with more teeth ? Ratio is driven by the # of teeth, not diameter.
Lets say your "small" ring is now a 46, the jump from 46/18 to 46/19 is 5.5%. The jump from more conventional 39/15 to 39/16 is 6.7%. At least I think that's where this was headed.