Seriously, though, two years ago I replaced the 170s on my early 80s Merckx with a Velo Orange 50.4 BCD in 175mm because my guy at the LBS suggested I might like 175s better and because the 170s were out of stock at VO at the time. They felt weird at first.

A few weeks later I picked up a long-tail cargo bike with 175mm and a few days after that, a friend gave me a BMX race bike with 180s. That put things in perspective. I fell in love with the later, though not with the crank length. I am now happy with 175s on all three bikes, so neither of the other bikes will mess up my BMX spin.

You’ll get used to whatever you use, within a reasonable range. So long as you can adjust your gearing accordingly and you’re not scraping pedals if you pedal while cornering.