Originally Posted by
gsa103
You can find tons of graphs of tire psi vs rolling resistance. You might reduce the rolling resistance by ~5%, at the expense of significantly worse handling.
Yea, but more likely to increase rolling resistance with too much pressure. The tire can't conform as well to the road surface and will bump over roughness rather than rolling over it. The idea of increasing pressure = decreasing rolling resistance assumes a smooth surface, not a normal road.