Proper Pressure

Johnny O

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Odd I never heard of the chalk test. Doing this today on my lunch break.

Kudos.
 

WheelNut

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nbas you beat me to it! I was going to post the same document. I've been trying to do some research on this subject recently too as I'm going to buy some new tires soon. Seems to me that avoiding LT tires for a Liberty that isn't a ******** off-road toy would be the way to go. The pressures required for E rated tires are bonkers and I would imagine that the ride would be horribly harsh on the street. There are a decent amount of AT tires available in Liberty sizes that are not LT, so I think there are some good choices out there. I honestly didn't think tire selection was such a detailed and complicated topic.

There is a bit more info on this page to help supplement the Toyo document: http://www.barrystiretech.com/loadtables.html

It would be interesting to see if people's chalk test results correlate to the tire pressure charts available.
 

808inthe949

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Love my scorpions! Grip on the pavement and the trail. No LT rating and the tread lasts with regular highway use.
Obv a MT would be better on the trail but my rig is 70/30 as it's my DD too.
 

tommudd

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nbas you beat me to it! I was going to post the same document. I've been trying to do some research on this subject recently too as I'm going to buy some new tires soon. Seems to me that avoiding LT tires for a Liberty that isn't a ******** off-road toy would be the way to go. The pressures required for E rated tires are bonkers and I would imagine that the ride would be horribly harsh on the street. There are a decent amount of AT tires available in Liberty sizes that are not LT, so I think there are some good choices out there. I honestly didn't think tire selection was such a detailed and complicated topic.

There is a bit more info on this page to help supplement the Toyo document: http://www.barrystiretech.com/loadtables.html

It would be interesting to see if people's chalk test results correlate to the tire pressure charts available.
Too many variables for everyone to be at or close to the same pressure
Put front and rear aftermarket bumpers along with heavy aftermarket skids , rock rails etc can add several hundred pounds more than a more stock KJ
 

nbas

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nbas you beat me to it! I was going to post the same document. I've been trying to do some research on this subject recently too as I'm going to buy some new tires soon. Seems to me that avoiding LT tires for a Liberty that isn't a ******** off-road toy would be the way to go. The pressures required for E rated tires are bonkers and I would imagine that the ride would be horribly harsh on the street. There are a decent amount of AT tires available in Liberty sizes that are not LT, so I think there are some good choices out there. I honestly didn't think tire selection was such a detailed and complicated topic.

There is a bit more info on this page to help supplement the Toyo document: http://www.barrystiretech.com/loadtables.html

It would be interesting to see if people's chalk test results correlate to the tire pressure charts available.
If you use the charts correctly, you will not see so much difference in pressures as you think. The ride is fine for me, I use the Cooper STT Pro which is an LT. Tyres have changed a lot the last decade regarding the compounds used. To me, the greatest change that changed everything is the OME lift! It was a whole new experience for me, it completelly transformed my Jeep!
 

nbas

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Too many variables for everyone to be at or close to the same pressure
Put front and rear aftermarket bumpers along with heavy aftermarket skids , rock rails etc can add several hundred pounds more than a more stock KJ
I fully agree, but the charts relate pressures to weight so if you measure the weight on each tyre, you will be able to find the correct pressure for each case. In my case, I have no aftermarket bumpers (metal bumpers are forbiden by law), so it was easier, and after 30.000Km (18.750miles), I can clearly see that they have even tyre wear...
 

tommudd

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I ran several sets on the 04 for example ( like the Goodyear Duratracs ) rotated every 3-3500 miles
wore even across with 4.5 inches of lift front and rear aftermarket bumpers, heavy skids, rock rails etc
at 34 lbs got over 95,000 miles out of them beofre I sold the tires and wheels
did not weigh the tires, just did caulk test
 
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