Double vs triple crank - chainline?
Posted: Tue Sep 12, 2017 4:42 am
Hi WW's
To get some steep climbing gearing on my bike I've been looking for a mountainbike crank to put on my road bike (bb30). With my current cassette and RD (maxed out) I can get away with an 18t difference in chainrings so optimally I'm looking for a 44/26t or 44/28t crank.
I haven't decided if I should go with a triple or a double. The triple has the benefit of already having a good large chainring for my purpose. (With a triple you replace the chainring bolts and put the large chainring in the middle ring position. Bit ugly but functional.)
My question is about chainline. The smallest ring on a triple, will it touch the frame? Will it have a screwed up chainline? I'm hoping to use it with at least the 1-8 easiest cogs on my 10s cassette.
Maybe a double would be better but the large chainring is too small and needs replacing (expensive).
(I already checked and my FD can take quite small chainrings if I lower it. Smaller than I will need.)
Thank you for your input.
/a
To get some steep climbing gearing on my bike I've been looking for a mountainbike crank to put on my road bike (bb30). With my current cassette and RD (maxed out) I can get away with an 18t difference in chainrings so optimally I'm looking for a 44/26t or 44/28t crank.
I haven't decided if I should go with a triple or a double. The triple has the benefit of already having a good large chainring for my purpose. (With a triple you replace the chainring bolts and put the large chainring in the middle ring position. Bit ugly but functional.)
My question is about chainline. The smallest ring on a triple, will it touch the frame? Will it have a screwed up chainline? I'm hoping to use it with at least the 1-8 easiest cogs on my 10s cassette.
Maybe a double would be better but the large chainring is too small and needs replacing (expensive).
(I already checked and my FD can take quite small chainrings if I lower it. Smaller than I will need.)
Thank you for your input.
/a