mnewxcv

http://www.6mt.net/forum/g35-coupe/1...port-rims.html

apparently infiniti states 35psi for the 19" rays. so i would say between 32 and 35 is the best for these cars.

soarer93

One person had it right here with Load rating and PSI being the key factor.

my tires are 95Y (front) and 100W rear (same brand but they don't have W up front anymore but whatever)
this means for proper load rating , I should be 33-34 PSI in front tires (I set them to 31-32 Cold) so as they heat up they are where they are supposed to be.
The rears I set to 27psi, so as they heat up they hit about 30 max which ends up being 1500 Load rating -
I don't want to set the tires to less than 27 but I know I can and probably should, but I have already found the rear tires have more of the middle tread wearing out than the outer edges as before I made this switch I had them set to 32 cold and by looking at the wear, they were over-inflated..

Here is a link that gives you a general rule of thumb to look at what you PSI should be as a base reference..
so forget other cars, forget other manufacturer's specs.. look at your own vehicle's spec and go by its Load rating - look at your tire's load/speed rating.. to determine where you should be for the factory ride feel/spec. You can put more or less as you see fit but I think this should put an end to this BS about " just put 35psi", " just put 3 over what manufacturer recommends" etc.

http://static1.1.sqspcdn.com/static/...D%2BSbPgnEI%3D

oldManTan

i have dunlop direzza dz102 tires which are pretty soft, sticky, and squishy, max psi says 52 so i have em at 44, they seem to be wearing very evenly, they grip like gorilla glue and i'm getting 24mpg. i usually go about 10-8 psi below the maximum, just seems logical to me if the max is higher then why not raise the psi with it as well. it really depends on the tires and what you want from them.