hi, very helpful indeed.
I have a cyclocross frame which originally came with a 105 5700 but I had a GRX 600 set installed.
So obviously my frame can take a 105 crank.
now I am asking myself: installing a leftside 105 4iii crank should not be an issue, is that correct?
And what about Q-Factor? What dies the difference mean in reality? I had a bike fit done and the setup is perfect, no knee pain. Would the new QF change the setup considerably?
The GRX 4iii is almost double the price of a 105 version.
thank you