Hey All,

On a road bike, I've heard you never adjust reach by adjusting your saddle setback. I had a general body scan fitting and was told my setback should be about 3.25". My question is, do bikes within one size of each other (say 54 and a 56) differ with how much you'd need to set the saddle for/aft? In other words, say I had to set the saddle way back on a 54 to achieve the right setback. Would the seat need to be set back the same on the next size up? Assuming reach issues were settled all with the stem. It seems to me all things considered, the angles and rear triangle wouldn't make that much a difference setback-wise between sizes?