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Lifted TJ 33" Tires, tire Pressure???

Jeep TJ Forum Third generation of the classic Jeep - manufactured since 1997. Known by the coil springs and round headlights. Includes the Rubicon and Unlimited editions as well

Lifted TJ 33" Tires, tire Pressure???

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Old 04-11-2013, 09:13 PM
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Default Lifted TJ 33" Tires, tire Pressure???

Hey guys I have an '05 TJ lifted with 3.5" rubicon express super flex kit and just put new shoes on her cooper st maxx tires (they are roughly 33"). I'm wondering about what kind of tire pressure I should be running just while driving around town? Thoughts??

The shop also did a wheel alignment but it is pulling a little to the right. Taking her back tomorrow to get her sorted in terms of the alignment.... Just curious about the tire pressure...
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Old 04-12-2013, 08:05 AM
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Default Re: Lifted TJ 33" Tires, tire Pressure???

it's difficult to say as tyres vary and vehicle weight also affects things. Here's what you do, find a flat area of paved ground with a puddle of water and drive through the water. Get out and look at the pattern you have left on the dry ground. What you are looking for is a full contact patch. Reduce the pressure until you have a contact pattern that is close to the full width of the flat area of the tyre. I'll take a guess and say it will be around 26 in your case.
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Old 04-12-2013, 09:19 AM
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Default Re: Lifted TJ 33" Tires, tire Pressure???

There is a chalk test for tires, google is your friend.

Water will not work properly,
if the tire is underinflated it will still show a full contact area.

All tires have a suggested inflation range right on each tire,
take a look.

Each jeep is different, and driving conditions vary.
Dry city roads will benefit from a harder more inflated tire,
while offroading will be easier with a less inflated tire.

Proper tire pressure affects both ride and steering.
Trial and error is your best bet.

I have driven with tires up to 40 lbs and down to 20 lbs.

Another tip is to rotate your tires frequently, at least every 2 months.
This will aid in an even wear pattern, make sure you put the 5th tire into the rotation.
You don't want to be one of those guys with 4 bald tires and 1 new one.
Adding the 5th tire into the rotation will add 20-25% more life into your tires.

Billy
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