true yet u wouldnt have to casue u could run much lower tire pressure than him anyways. less tire pressure=more grip.:biggrin:The only downside I can see with these things is being at the top of the race course when the guy next to me gives his valves a couple of love taps to let a few PSI out of his tires. I can just imagine frantically trying to do that to all of my balls before my run.