Recently, I've been having some pain in my hips (bilaterally, although worse on the right). I know my flexibility is horrible, so I've started stretching more than usual, but probably still not enough. I did some digging around on the internet, and found that oversized crank length can lead to knee and hip pain. This is interesting, because when I built my bike, I initially had 175mm arms (WAY too long), which I downsized to 172.5mm. For the race season, I'd like to switch my setup from a triple ring to a double, so I'm faced with the issue of deciding crank length once again. I stumbled across an interesting read....here it is:
http://www.cptips.com/crnklth.htm
According to the author, at 5'10" I'm exactly borderline between 170mm and 172.5mm proper crank arm length. It does say, however, that too short can be inefficient unless you spin at higher cadence. This still doesn't help my decision, as I'm comfortable around 90 rpm. Why can't the technical stuff ever be easy?
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