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Unread 09-06-2006, 10:59 PM   #1
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Location: Fairhope, Alabama
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Tire PSI on road/off road

What is the best tire PSI to run on road/off road with 31x10.5 kumho mud terrains?

1989 Jeep Cherokee 4x4
3 inch Rough Country AAL lift
Cragar soft 8 wheels
31x10.5 Kumho Mud Terrain tires
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Unread 09-07-2006, 12:19 AM   #2
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2000 XJ Cherokee 
Join Date: Apr 2002
Location: out in the garage - Minneapolis, Minnesota
Posts: 24,052
27-32 psi on road depending on how the tires wear. 14-18 psi on the trial, lower if somebody has onboard air (in case one comes off the bead of the rim).

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Unread 09-07-2006, 12:24 AM   #3
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1993 XJ Cherokee 
Join Date: Aug 2002
Location: Austin, TX
Posts: 20,821
Take some chalk and draw a line straight across the tread. Then drive in a straight line for a couple of yards and inspect the marks.

If the lines are still thick and unrubbed on the outside the tires need to be deflated some.

If they are not rubbed as much on the middle and rubbed good one the sides, the tires need inflated some.
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