Originally Posted by RBfastback

diameters aren't really my goal, it's for now while I have stock wheels I'm looking for the most traction possible for the rear for when I f.i. my z.
idk where I was reading it about going from 285/35/19 to 305/30/19 isn't as much grip (in a strait line) as u think because of the loss of circumference. obviously when cornering it's better.
only options I can find on the calculator are 295/35 but that's such a minuscule difference and there more expensive or 325/30 and those look like they would be amazing but I don't think it will work in the 10.5 rear nismo wheels...
any thoughts aside from new wheels cuz that won't be for awhile.

I plan on using PSS tires