I’ll preface this by saying that I’ve got short legs. My current cranks are Ultegra R8000 170mm.
That being the case, I have a difficult time setting a comfortable saddle height. I’ve had a professional bike fit but my resulting saddle height feels like a poor compromise due to the range of motion from top dead center to bottom. There doesn’t seem to be a happy medium where I’m comfortable. I’m either too flexed or too extended.
I was reading online last night about optimal crank arm length as one of a number of formulas that resulted in 160mm or 161mm depending on which one I used (Inseam x 1.25 + 65 or height x .95). My inseam is 30 inches (76.2cm) while I’m 5’ 7” tall (170.2cm).
And so I’m considering replacing my crankset with a 105 R7000 160mm set. I thinking this would allow me to have a better range of motion, where I’m not overly flexed or overly extended.
But I’d like some advice from others who have experienced the same thing before I replace an otherwise perfectly good crankset. Is it worth doing this?