I'm 122# and I keep my Conti GP4000s at 110 front and rear. I definitely notice the increased rolling resistance if I go lower. There is a tradeoff in efficiency when the roads are so rough that your drive wheel is losing contact with the road surface - but those are also the times that a pinch flat is most likely. So just experiment.
Also, I air my road bike tires every ride. High-pressure road tires and tubes lose almost as much pressure just sitting around as they do being ridden. On the fat-tire commuter, once a week is plenty.
Out of curiosity, does anyone run their tires at different pressures front to rear? If so, how do you like it?
Last edited by OakLeaf; 05-31-2010 at 04:42 AM.
Speed comes from what you put behind you. - Judi Ketteler