Originally Posted by
duane_pipe
Is the chainring spacing different? I was under the assumption the "speed" on the chainset/crankset was a marketing thing, apart from when it goes to 'compact' sets. I'll look into the spacing though definitely something I had missed. Solution - 9 speed chain.
Yeah, "9-speed" cranks have their chainrings spaced a bit closer together than 7/8-speed cranks to keep the thinner chain from getting hung up between them. 10-speed cranks are very slightly closer spaced yet but the difference doesn't seem to cause many problems.