hi, i was just wondering if tire size makes difference when inflating them.. i used to have 33psi in the front and 32 in the rear with the stock 16's, but right now, i am running size 225/40/18 in the front and 255/35/18 in the rear.. how much psi should i put in them?

 

Probably the easiest way to see if you need less pressure is to look at how much roll over you are experiencing when pushing the car at it's cornering limits. The tread should have small arrows or dots at the very edge of the tread...that indicates the ideal roll over. You should be able to see where the rubber is scrubbed and it should go to that indicator mark. If you are having a hard time seeing the scrubbed rubber.

Ideally, a pyrometer will tell you whether you need more/less air or how your camber settings should change.

 

The air pressures should be the same as stock. Keep in mind this is air pressure and not volume. The air pressure is based on the weight of the vehicle and the handling and the car has not changed.

 

just the info i was looking for. ty