Originally Posted by
filtersweep
There are all sorts of differences--- ranging from Q-factor, to the fact that most mtn bike cranks need to accommodate much smaller rings, and thus have smaller bolt circle diameters. You cannot fit a 20T ring on a 144 BCD crank.
But why are you posting this in SS/FG?
I'm posing this in the ssfg area because that is the kind of bike i'm building, and have been considering trying to modify other cranks.
yeah and i very well may just stick with getting a ssfg crank. another thing though. how do i know if a chain i have is 1/8" or 3/32" because it seems like there is two different sizes of cranks.