Jeep Wrangler Forum

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-   -   tire pressure (http://www.wranglerforum.com/f27/tire-pressure-131324.html)

suggerdaddy 01-05-2012 12:12 AM

tire pressure
 
Is it better to have the max psi in my tires or less

InvertChaos 01-05-2012 12:13 AM

What tire size are we dealing with? You'll most likely want to be running less than Max that's for sure!

kbwwolf 01-05-2012 12:58 AM

^^You should never have to run max. Assuming you have aftermarket tires...For 33's you should run about 30-32 PSI. For 35's, 28-30. If your tires are stock, go by your door placard.

If you really wanna dial it in, do a chalk test. See post #54 in the link below.

Highway speed drifting

And here's a visual representation of how the chalk test works...without the chalk. :D

Attachment 87520

suggerdaddy 01-05-2012 09:02 PM

I have 30's

suggerdaddy 01-05-2012 11:49 PM

I thought having lower tire pressure makes it so u have worse mpg

TJNewbie 01-06-2012 02:10 AM

it depends on the tire, and the weight of your vehical. the 33x12.50x15s run best between 28 to 26 psi on a TJ.

InvertChaos 01-06-2012 07:30 AM

Since you have 30s go with whatever the door frame says. 31-32psi I think

nissanman1 01-18-2012 11:11 AM

I've got a related question, I have Coursers on my Sahara but one has a hole that can't be patched... long story short, to keep from buying a mismatched tire since the AWT is not available I put my Goodyear Wrangler spare one and plan to buy a used cheapo for a spare. Question is: the Coursers have max PSI of 50, the Goodyear has max of 32 psi. Is that going to be dangerous or ride bad. Don't want to kill myself cheaping over a 150.00 tire. but the next full set i get will be more aggressive tread, so i hate to throw money down the drain because the other three are 60% tread

TJNewbie 01-18-2012 02:04 PM

which Courser tire is it?

TJNewbie 01-18-2012 02:07 PM

Quote:

Originally Posted by TJNewbie (Post 1893412)
it depends on the tire, and the weight of your vehical. the 33x12.50x15s run best between 28 to 26 psi on a TJ.

I see I forgot something, I meant to say the GoodYear Duratrac 33x12.50x15 tires run best between 28 to 26 psi on a TJ.

kluckr 01-18-2012 02:14 PM

I have had the duratrac for about 8k now and have run 34 psi without any problems nice humm and great even treadware...

TJNewbie 01-18-2012 06:47 PM

I started out with the higher pressure, but the steering felt like I was riding on over inflated beach balls. I dropped it bit by bit and settled at 26 psi with a good contact patch and smooth ride.

Frisco Rubi 01-18-2012 10:34 PM

Every jeep/tire combo is different, you can do the chalk test or experiment. When I went to 35s on my Rubi I tried 18 to 28 psi.
I like 20 for the ride and wear. I've went up to 24-26 to see if fuel mileage picked up, couldn't tell much if any difference, gets around 15 on the highway. I use 8 psi on the trail and redrocks.
Ron

JYJeep 01-18-2012 10:50 PM

^^^ do the chalk test.

kbwwolf 01-19-2012 03:09 AM

Quote:

Originally Posted by Frisco Rubi (Post 1936170)
Every jeep/tire combo is different, you can do the chalk test or experiment. When I went to 35s on my Rubi I tried 18 to 28 psi.
I like 20 for the ride and wear. I've went up to 24-26 to see if fuel mileage picked up, couldn't tell much if any difference, gets around 15 on the highway. I use 8 psi on the trail and redrocks.
Ron

:eek:

20?

Please, take JYJeep's advice.

mike3770 01-19-2012 04:48 PM

While were on the topic what about 31" Goodyear all terrains? I have them at 28psi right now but should I be higher?


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