help with air pressure..

[Mtxkidd]

I have a 2015 z71 crew cab with 7.5 RCX lift and 35x12.50x20 on 20x9 wheels with a 0 offsett...and I noticed that my rear tires are not wearing on the inner or outter edges(about .5-.75)..they are obviously not making contact with the ground but I am only running 32 PSI in the rear tires that already seems low..what do you guys think..??...FYi tires only have about 400-500 miles on them...front tires are wearing good as well

[Vic15]

Your rear tires aren't making contact with the ground? Sorry couldn't resist. I'm running about 46 PSI in the front and 44 PSI in the rear. I have 35X12.5 on 20X10 wheels.

[Vic15]

Also, with that low of mileage you're not going to see any wear at all.

[Mtxkidd]

haha I was referring to the outter edges not touching the ground.and I can tell by looking at them that the edges are not wearing at all..just trying to get the right pressure so these tires will last...thanx for your input too..I'm wondering if my rear 1.75 wheel spacers might have something to do with it at all

[Georgia1911]

I agree it's a little early to say you have an issue, but 9" is on the narrow end of acceptable rim widths for a 12.5" tire. That may be causing the tire to crown a bit.