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@greeno
(With reference to Shimano). Am reading that 11 speed chainrings with a 12 speed chain is fine, but want to know what exactly is the difference between 11 and 12 speed chainrings and chains? Reading vague conflicting things.
Is the gap on 12 speed chains thinner?
If so assume the 12 speed chainrings are thinner?
Is the space between the chainrings on a 12 speed crankset different to the spacing of the chainrings on an 11 speed crankset?
And ultimately, have an ultegra r8100 chainset. What is actually changing when I switch the outer 12 speed ring to an 11 speed ring? (Keeping the 12 speed inner)