Originally Posted by
samkl
But when I installed the new chainrings the spacing was clearly off: the chainrings were way too close to each other. If there was a chain on it, it would rub against the 48t chainring bolts. So I'm totally stumped. The new chainrings are 11-speed, and the old were 9 speed, but I don't see how that would create this problem.
When I did 3x8 to 2x11 conversion on my Merlin road bike, I needed to replace the chain ring spacers on the Mavic crankset so the chainring spacing is correct for 11S chain and chainring. Vague memory of using 3mm down from 4mm but I could be wrong on the precise thickness.