I was over in the Road Cycling forum, and someone was mentioning 180mm cranks being better than even 175's for tall people. I'm rather tall at 6', so I thought I'd stick this link http://www.xoutfitters.com/bmx/crankarm/ here as a good place to keep up with stuff for my bike.

Question: I did some measuring. Can 5mm (~3/16") or even 10mm (~3/8") on one crankarm really make that much difference in pedaling??