Following on from my comments on the KQ thread about gearing, I now find there’s another possible stumbling block!
My TT DuraAce cranks are 53/39 (or 55/42) with a 175mm crank.
My Ultegra cranks are a 52/36 and a 172.5mm crank.
My 105 cranks are a 50/34 and a 170mm crank.
Can I just swap them out with no discernible difference?
Is 5mm neither here nor there? Or would I notice a difference?
Cheers in advance