what is the best tire presure for a 205 50 15 in the stock wheel? I have the toyo proxies and the max is 44psi.

 

Is this for the Street, track, or drag racing? Stock on a ITR is 35 front and 33 rear. Thats what I run on the street.

Mattj

 

I run 37/35 with RE-730s. A little extra pressure gives me a bit of extra confidence against rolling onto the sidewall (shrug). Obviouslyy, if you autocross, you'll want even more pressure up fron; drag racing, much less.

Stock pressure (35/33) is irrespective of size - it's based on load.

 

is that with a 205 50 15 that is the recomendation for a 195 55 15 but i am looking for a good street /race combo a little more on the race side

 

Tire pressure is always a matter of preference. If you don't know try 35/33. If that seems good then leave it. There is no such thing as a "best" pressure for all conditions and all drivers. If there was then a lot of race teams would have nothing to do

 

Each tire brand may have a different optimal tire pressure for each different aspect. For the street on my Kumho 712's 205 50 15, the best pressure I found was 40F/38R. It is high because Kumho's suffer from soft sidewalls. (that is what I have been told.) But, a different brand may not need to go so high. Also, tire pressure is dependent on ambient temperature and road surface temperature. Therefore a good pressure in the summer may be a bad pressure in the winter. Just experiment. Use a baseline pressure, like 35F/33R and then increase/decrease each by one or two psi until you find a pressure you like.
From autocrossing, I noticed a lot of novice drivers steer too much, therefore creating push and front tire roll over. If this is you, then you may need to have higher pressures up front.

 

Start off at 35f/35r. Then, go up if needed.