opinions on sharpening chainring teeth?
what's your opinion on sharpening or cleaning up old, rounded chainring teeth with a metal file?
do sharper, more narrow teeth add much to shifting and overall performance over wider, but more rounded teeth? the effort would not make the teeth any taller, which intuitively seems most important.
does a little sharpening go a long way, or are you better served leaving the teeth alone?
in the words of andy kaufman, thank you very much.