Originally Posted by
fietsbob
Absolute highest performance requirements of athletes, have a mythology of their own,
that is just not applicable to the general population.
This...
I have multiple bikes with multiple riding positions all are close and but not similar. I am not a top notch athlete, but I do ride quite a few miles a year. I can tell very quickly if a bike is not comfortable to me, I stop, make the adjustment and continue the ride. I have a couple of dimensions that are critical to ME, but may not matter to someone else. Yes a few mm can make a difference, but if a bike is set up close to begin with making a change is not going to "injure" you. FWIW I have been riding over 40 years, fit used to matter more than it does now.
Aaron