I realize the OEM tires were designed specifically for the S2k taking into account the springs, dampers, weight of the car, etc...

Now, theoratically, if you get non-OEM tires and put them on stock wheels, assuming the tire width/dia is the same, you would need to adjust the tire pressure so the new tire's spring rates match the OEM tire's spring rates. e.g. raise tire pressure to 36 psi to increase tire spring rate to match the spring rates of OEM tires at 32 psi.

Does this make sense or tire spring rates are not that significant that you'd notice a difference? Where do you find the spring rates for different tires? How do you determine what change in tire pressure is required to match OEM tire spring rates?

 

Some will notice the difference; many will not.

The S02's have very stiff sidewalls for a street tire so many passenger car tires will feel less controlled in comparison. I don't think you want to try to make up the difference with pressure, as you would change the footprint before you could make up too much difference in stiffness.

Probably want to stick with max-performance tires and recommended pressures.. or accept handling that is less quick and firm.