Autocross Tire Pressures (basic Q's)

[67rally]

On my car i run the RS3's. i start with 28 cold and after a run it should climb up to 32psi, they seem to grip the best around 32psi hot. When i ran rivals, i would start it at 32 and they liked to be around the 38psi hot. every tire is going to be a little different. i would call nitto and find out what the engineers say to run them at, and keep in mind the hot and cold pressures.

Thanks, I contacted Nitto before posting this, gave them my car specs, and asked what they recommended for daily driving vs autox and this was their reply:

Regarding your inquiry, based on the vehicle information you provided, the recommended replacement psi for the NT555 245/40ZR18 93W and NT555 275/40ZR18 103W is 32 psi for front and 29 psi rear tires.

So I asked: "Thank you. So you don't recommend changing/increasing the tire pressure for an Autocross vs daily driving?"

The NT555 has excellent traction response and handling capabilities with great performance, however, it is not considered a dedicated competition tire. The optimum tire pressures for track use would depend on how much your tire pressures grow on a specific track. If using NT555 for track use, the right setup and PSI would ultimately depend on what you feel most comfortable with.



Nitto Tire U.S.A Inc. cannot endorse using a lower PSI than what is recommended for daily use.