As soon as I get shorter cranks (I currently use 165s--a little wobbly) I'll be ripping up the west side highway (I hope...)
In case you happen on past threads where I wrote about the 125mm cranks on my 26x2.5 Hookworm clad unicycle: It turns out I was riding 140s, which were surprisingly smoother for me than 150s. I have one slow ride on 125s, and I can tell you one thing for sure - short cranks are not good for slow riding!