Nuke

Now you guys have me really curious. I just checked my tire's specs on Tirerack and they're rated 51 PSI max.. Guess I'll confirm that on the sidewall after I get home and consider how much higher I want to begin experimenting at...

bchataroo

I will probably try 36ish. I am lowered, so ride quality has already taken a hit. I thought I was getting good mileage until I saw some 30's. I have never seen 30 on my mileage counter. At 70 mph I can get around 23.5. Maybe the 3.73 gear took more of my mileage than I thought!

mustangman02232

unless your costing down a lot of hills or flat driving with a tail wind i doubt you would be able to do 30 constantly throughout the tank, but the higher PSI is better for fuel economy cause there is less rolling resistance, which is why i ran my fronts at 40 psi, 44 was max, just slightly under cause the front tires dont need exceptional grip,

Boozshey

Sorry for the ignorance in tires. I am running at 32-35. What benefit will the higher pressure give me. I don't care at all about ride quality. It's not a luxury car.

Nuke

Higher pressure (up to the rated max for that tire) will decrease rolling resistance and also usually reduces temperature buildup. The tradeoff is ride quality and handling, the latter of which is more a function of that particular tire so you need to experiment. With increased pressure, a larger percentage of your tire-to-road contact is more on the center of the tread.

What has worked for me with one tire was all wrong with another so experiment. I usually try different pressures in 2 PSI increments.

Boozshey

So nothing that's going to really be noticed in everyday driving?

bchataroo

Higher tire pressure will give you better gas mileage because of the facts stated above.

Nuke

I'd have to say that depends. I drive mostly highway long distance and my gut tells me that I DON'T want to be at 40 PSI with my tires in the rain at 75 MPH (and since I drive about 6 hours each way I'm NOT slowin' down!). I believe I could safely go about 4 -6 PSI higher than my normal 32 PSI in my instance.

But to answwer you're question, I'd recommend experimenting and see if what you FEEL at different pressures is acceptable to YOU. You may decide you don't like the ride at too high a value. Just have to "play". Besides, it gives you another reason to tool around town (as if we NEED a reason).

CutterWolf

Ok, here is the deal with running a higher PSI. 1. Higher PSI = better MPG as told above. 2. Higher PSI = less tire wear = longer lasting tires. 3. Higher PSI = more pot hole protection is your running a short side wall like 35's or below. This is why with 20's and 35 side walls I run at 40 psi since I want my tires to last, get the best MPH I can and with over $1,100.00 in wheels I sure as hell don't want to bend one from an unfore seen pot hole

P.S. I have had no problems what so ever with grip even at 80 in the rain but I'm betting that the Nitto 555's have a lot to do with it, they just plain stick to the road.

whtcanbrwnd04u

Nittos' def are not my favorite tire. I think my toyo proxies grip better to tell you the truth. Anyway.. I run mine around 33psi.