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PSI question
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=8&t=34733
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Author:  tommudd [ Mon Aug 04, 2008 4:00 pm ]
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For you I would say about 36/38, not sure what size, ply you have but somewhere in there, ( you will NEVER need to go to 85 lbs unless you are hauling 8000 lbs! :lol: :lol:

Author:  jeepkj02 [ Mon Aug 04, 2008 4:15 pm ]
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Do a chalk test to make sure.

Author:  CrossBones [ Wed Aug 20, 2008 12:11 am ]
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I run LT255/70R/16 BFG TA KO'S @ 40 psi on road. This seems to give me the best MPG.

I have a question for you, or anyone, would psi should I air down to when wheelin' at places like Crystal Lake (dirt, mud, hills), etc.?

Author:  tommudd [ Wed Aug 20, 2008 12:15 am ]
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CrossBones

yes air down any time you are out wheeling, you want the tires to grip and sort of mold themselves over rocks etc instead of riding up on top of them, so yes air down helps a lot!

Author:  Guest [ Wed Aug 20, 2008 12:26 am ]
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the max inflation is 80, not 85. I run my LRE MT/R's anywhere from 35-38 front and 33-36 rear, and still knock down 21-22 mpg hwy if I drive like a sane person 8)

Author:  CrossBones [ Wed Aug 20, 2008 12:28 am ]
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Thanks. Is there a specific rule of thumb when it comes to airing down? IOW, how do you gauge what psi to air down to?

Author:  Guest [ Wed Aug 20, 2008 12:30 am ]
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Wild guess.

Basically, pick a number that sounds good...drop by 2 psi every time you go out, until you de-bead a tire...then add 4 psi:)

Author:  meh_kick [ Wed Aug 20, 2008 2:02 pm ]
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I have found, using Thunderbirds specs, 16.8 psi Right Front, 17.1 pst Left Front, 15.3 Right/Left Rear to be the best on my 10 ply MTR.

Author:  tommudd [ Wed Aug 20, 2008 2:14 pm ]
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meh_kick wrote:
I have found, using Thunderbirds specs, 16.8 psi Right Front, 17.1 pst Left Front, 15.3 Right/Left Rear to be the best on my 10 ply MTR.



you would use his specs wouldn't you :wink: :wink: :wink: :wink: :shock:

Author:  meh_kick [ Wed Aug 20, 2008 2:36 pm ]
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tommudd wrote:
meh_kick wrote:
I have found, using Thunderbirds specs, 16.8 psi Right Front, 17.1 pst Left Front, 15.3 Right/Left Rear to be the best on my 10 ply MTR.



you would use his specs wouldn't you :wink: :wink: :wink: :wink: :shock:


Has to be precise and exact. Otherwise it won't work - slide all over the place.

Author:  CrossBones [ Wed Aug 20, 2008 10:05 pm ]
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yellocoyote wrote:
ThunderbirdJunkie wrote:
Wild guess.


Yep, me too. I typically go between 15-20... usually a little on the higher side though, depending on terrain. So far, so good.

I'll play with that varying ballpark figure and see how I do. Thanks.

Author:  Guest [ Wed Aug 20, 2008 11:43 pm ]
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tommudd wrote:
meh_kick wrote:
I have found, using Thunderbirds specs, 16.8 psi Right Front, 17.1 pst Left Front, 15.3 Right/Left Rear to be the best on my 10 ply MTR.



you would use his specs wouldn't you :wink: :wink: :wink: :wink: :shock:


Nah, he's the math guy. I just round to the nearest number. He got it all dialed in and specific :lol:

Seriously, though, half the time I don't even air down.

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