Message #15614

[jim-ratliff]

My legs were underworked but my heart was screaming on the 172.5..

I find that a really interesting assessment from a pretty fit biker, especially given the old mantra about "don't push the gears, spin them". 


And I'm very surprised that there's that much difference for such a small difference in length.  1 inch = 2.54 cm = 25.4 mm.  So 2.5mm increase in crank length is only 1/10th of an inch.