Originally Posted by MouSe
I understand that an under inflated tire would be smaller than the rest, so therefore should turn faster. BUT, when a tire is under inflated it'* rolling resistance increases dramatically. That would make it turn slower than the rest, not faster.
If it turned slower, it would drag on the pavement. In order to maintain the same roadspeed as the rest of the vehicle, a smaller tire will turn faster. The increased amount of rolling resistance just means you are using more energy.