Very interesting comments!
I wish I had a set of 170mm so I could do a decent A/B. At the end of the day I’ll always be a slow old hack anyway, but as I said above, it’d be nice to be able to make an informed choice before parting with a heap of cash if there’s a better option.
Matthias, did you change to 170mm because a coach told you to or something, or did you just take a punt?
If it makes any difference (doubt it but whatevs), my body dimensions are very average in most respects. I think I’m about 5’10", I always ride approx. 55cm square frames and am neither particularly heavy nor stick thin. Have got average length limbs too. The only thing I can think of that’s a bit of an anomaly is the size of my feet. They are fecking huge. No idea if that would have any bearing on desirable crank length though.
Maybe I should just buy some 170mm and see how they go. If, although unlikely, they feel really shit, I’ll just sell them and cut my losses. If they feel better or exactly the same, I guess that’s sort of a win either way.