Originally Posted by
Koyote
Going higher than the rated psi will give you a slower and rougher ride with an increased chance of tire or rim failure. Aside from that, it's a great idea.
There are some benefits, for instance I have a commuter bike that mainly sees nice tarmac but has a 37 knobby up front. When I pump it up to 100 psi the knobs aren't in contact with the road when going in a straight line. sucks in corners but its great for rough terrain and potholes