Originally Posted by Whaazup17
do you mean the spring rate of the tire? I was just thinking about that cause the tire is like a spring
No unsprung weight, I think the easiest way to explain it would be "any weight that does not rest on the suspension itself." The resistance of the tire to bumps wouldn't be effected that much if the tires were inflated to the same pressure, this only based on the assumption that the two gasses do not expand at vastly different rates when subjected to temperature changes.