Originally Posted by
cyccommute
.The concern for motor sports is probably overblown. For example, a change of 330°F (from 70°F to 400°F) results in a pressure increase of 25psi (from 40psi to 65psi). Not all that much of a change.
For motorcycle racing, where the difference between the winner and last can be as little as 1 second per lap - or less than a tenth of a second per turn - the difference of a couple of PSI can make a huge difference in tire temperatures and grip levels.