My understanding is that 7/8/9/10 chainring spacing is the same.
I have a Shimano Claris double/2x8-speed that I want to upgrade to a triple front, but using a 10-speed crank. I’ve acquired a Shimano Tigara 3x10 front derailleur/mech, triple/3x8 left brifter, and will run a 10-speed chain. I may have a cage length issue, but otherwise will this work?
But also, let’s settle this, since I’ve looked this up a bunch, and it leads to much more complex discussions and a lot of noise. Do 7/8/9/10-speed cranks all have the same spacing? Then what about 11 and 12?