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tire pressure


 
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nikon
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Joined: 27 Jan 2004
Location: Burlington, Vermont

PostPosted: Thu Mar 18, 2004 6:11 pm    Post subject: tire pressure Reply with quote

What do you suggest running the 31s at? They indicate a max press of 50 and I was plannin on running them 44/45 for road use. Bad idea? I want them to last as long as I can so I want a proper wear on them. Thoughts?
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Black2001TJ
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Joined: 03 Jan 2004

PostPosted: Thu Mar 18, 2004 6:15 pm    Post subject: Re: tire pressure Reply with quote

nikon wrote:
What do you suggest running the 31s at? They indicate a max press of 50 and I was plannin on running them 44/45 for road use. Bad idea? I want them to last as long as I can so I want a proper wear on them. Thoughts?


Not sure what your specific tires should be on road, I'm willing to bet in the 40s is wayyyy to high.. I run my 33" MT/Rs at 28psi on the road. If you are unsure, try 32psi and see how you like it.. You can go to a level parking lot and put chalk on your tires and see how the tread makes contact with the ground.
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ehirner
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Joined: 01 Jan 2004
Location: Eastern PA

PostPosted: Thu Mar 18, 2004 7:17 pm    Post subject: Re: tire pressure Reply with quote

Black2001TJ wrote:
You can go to a level parking lot and put chalk on your tires and see how the tread makes contact with the ground.

You want the entire width of the tread to come in contact with the ground evenly. Too much pressure in the tires and you'll wear the middle of the tread. Not enough pressure and you'll wear the outside edges of the tread. You want it just right. With that said, anything above 30 is likely going to be too high. Wrangler's are not very heavy.
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Tx Outlaw
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Joined: 05 Jan 2004
Location: Texas

PostPosted: Thu Mar 18, 2004 8:04 pm    Post subject: Reply with quote

I always did the chalk test on a flat parking lot. Another trick I learned was using a credit card. Slide the edge of the card under the side of the tread. It should slide under 1/8 to 1/4" max.

Chuck
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ThePhantum
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Joined: 23 Jan 2004
Location: I knew it...I'm surrounded by Assholes!

PostPosted: Thu Mar 18, 2004 8:10 pm    Post subject: Reply with quote

Everybody has a different method for getting tires right. I've heard of the chalk method and that it works well. But here's what I do when I get new skins:

I start at 30psi and watch my gas mileage. Then I start adjusting my air pressure to whatever gets me the most MPG's while still keeping the right "patch" (the entire width of the tread on the ground)....currently that's 32psi in the XJ (on 30's) and 29psi in the TJ (on 32's).

HTH

Rock On!

Steve
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nikon
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Joined: 27 Jan 2004
Location: Burlington, Vermont

PostPosted: Thu Mar 18, 2004 8:11 pm    Post subject: Reply with quote

as always - thanks again fellas
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ehirner
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Joined: 01 Jan 2004
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PostPosted: Thu Mar 18, 2004 8:53 pm    Post subject: Reply with quote

Tx Outlaw wrote:
Another trick I learned was using a credit card. Slide the edge of the card under the side of the tread. It should slide under 1/8 to 1/4" max.

I like this one. Much more convenient to do anytime and not as messy.
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