The reason we run higher Psi on the tyres on the track or twisties is to strengthen the sidewalls due to the stress when doing hard cornering..

The general rule is to leave like a 25% window, say a tyre's maximum Psi load is 60Psi, the 25% window will be 45 - 60 Psi... So that 15 Psi range is where you will experiment and find out which Psi in that range will allow you to perform at it's best.. After that, you fine tune it to like 1-2 Psi range... Takes some work but heck, it's good for cars with no suspension mods!


As for road use, just follow manufacturer's recommendation... BUT it is not the determining factor to good tyre life... Another rule of the thumb is when you driving on a highway or if you are carrying heavy load in the car, add another 4Psi.....

I run mine 35F and 34R as a daily driver, 22-25F on drag strips depending on conditions... 50Psi for sideways action!