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Old 04-13-2014, 02:35 PM   #1
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Tire psi

What is the recommended PSI for Mickey Thompson 35 inch atz p3. It says max psi 65 however I would like something for normal riding that will help the tire lasts. No off roaring for now. Any tips?

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Old 04-13-2014, 02:46 PM   #2
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Google tire chalk test.

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Old 04-13-2014, 02:50 PM   #3
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I would start at 28-30.
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Old 04-14-2014, 10:33 AM   #4
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what is the rational for that? The place that did the install had them at 45
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Old 04-14-2014, 10:42 AM   #5
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thank you for the reply, just learning
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Old 04-14-2014, 11:33 AM   #6
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The place that installed them doesn't know what psi Jeeps need. Hardly anyone runs them at 45. Maybe if you have a 7000 lb truck and are towing something.
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Old 04-14-2014, 11:38 AM   #7
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x2 on the tire chalk test. Mickey T doesnt know what vehicle their tires are going to be mounted on, so each one varies. run a line of chalk or a tire crayon across the tread from side to side. roll down the road a little ways, stop and check where the chalk has worn off. if its all worn off in the middle of the tire but still visible on the edges = drop the pressure down a little. worn off on the outer edges but still visible in the center = add a little pressure
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Old 04-14-2014, 12:28 PM   #8
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I will do that. Thanks to all
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Old 05-13-2014, 07:47 PM   #9
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Ok so I have gone all the way down to 28 psi. I may even be able to get lower as the chalk still comes up a little stronger on the edges. Question. My tpms sensors are going off and flashing. Anyway to set this to a lower number. I guess anything below 29 is an alarm.
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Old 05-13-2014, 07:50 PM   #10
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Your dealer can set it lower for you- let's say 26 PSI or so. You can also do this yourself using an AEV Procal ($160).

My dealer set mine to 30 (from 35 or 37). However, I then wanted to stay around 28, so used my Procal and set it to 24 or 26.
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Old 05-13-2014, 07:52 PM   #11
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Thanks but is that normal. 28psi? And it's a much bigger tire than the stock ones. I may even be able to go lower
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Old 05-13-2014, 07:53 PM   #12
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Quote:
Originally Posted by Gjaleman View Post
Ok so I have gone all the way down to 28 psi. I may even be able to get lower as the chalk still comes up a little stronger on the edges. Question. My tpms sensors are going off and flashing. Anyway to set this to a lower number. I guess anything below 29 is an alarm.
Yea you can use a AEV Procal or superchips flashcal / trail dash to reset tpm parameters
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Old 05-13-2014, 07:56 PM   #13
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160 bucks seems a lot. What else can I do with the procal?
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Old 05-13-2014, 07:57 PM   #14
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28 is very common. Even 24/26 is common around here for guys who run E-rated tires. I run my C-rated MTRs at 28. On my 2-door, I ran them at 24. It is perfectly square/flat at those PSIs. People don't realize how light our Jeeps are when compared to trucks and most D/E rated tires have extra plies to handle towing and loads. They are not really made for Jeeps. Ofroading-type tires have C ratings for a reason- lighter vehicles and conforming tread for traction on rocks. 28 is WAY more normal than 40.
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Old 05-13-2014, 08:05 PM   #15
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Thanks bro. I may even be able to go to 26 but now I'm scared this is too much. The edge of the chalk is still stronger on the outermost edge toward the street. Not the inner edge.
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Old 05-13-2014, 08:06 PM   #16
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I also won't be doing much off-roading. Mostly street and highway.
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Old 05-13-2014, 08:22 PM   #17
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Hold at 28 for a while, though 26 will not hurt the tires at all. Some experienced people say that especially with stiffer-sidewalled tires, it take times for the sidewalls to soften slightly on these light Jeeps. They recommend airing down to 12-14 and offroading it to break down the sidewall stiffness a bit. I did that with my MTRs and that did help. Before that, I was tempted to run them at 20 (and did) on my light 2-door JKR. I did 300 miles on the highway at 20 PSI with no effect on gas mileage or wear. So I ran them at 20 for another 2,000 miles or so. After a few trips offroad, they softened up and I ran them at 24.
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Old 05-13-2014, 08:53 PM   #18
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Quote:
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160 bucks seems a lot. What else can I do with the procal?
You need it to also adjust your speedometer and odometer for the larger tires.
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Old 05-14-2014, 07:40 AM   #19
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Ok. That was done already at the place I did the lift. I'll just see if the dealer can do it

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