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Discussion Starter #1
Just re-shoed Eugene with some 33 x12 super swamper vortracs...what kind of tire pressure are people running on 33 inch tires???
 

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33X12.50's on a TJ should be happy with 26-28 PSI or so. I"ve been running my 32X11.50's @30, but fixin to drop them down to 28.
 

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Patrick H said:
33X12.50's on a TJ should be happy with 26-28 PSI or so. I"ve been running my 32X11.50's @30, but fixin to drop them down to 28.
Am I ok with 32 or should I be lower?
 

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you should be lower.....

I'm at 26-28 on 33x12.50 Duratracs.
 

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Dropping my 33" Nitto Trail Grabbers from mid 30's to 26-28 made a huge difference in the ride, CD doesn't even skip anymore. :) Haven't checked the mpg difference cause if I was worried about that I wouldn't be driving a Jeep.
 

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Discussion Starter #8
Dropping my 33" Nitto Trail Grabbers from mid 30's to 26-28 made a huge difference in the ride, CD doesn't even skip anymore. :) Haven't checked the mpg difference cause if I was worried about that I wouldn't be driving a Jeep.
I have about 22 - 24 now and ride is very smooth ...other than the B25 bomber noise at highway speed......next question would be what do people figure the speedo correction factor is about with 33's??
 

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There is a chart online that tells what speedo gear you need in relation to tire size and gear combo. I can't link it from my iPhone. Sorry
 

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Discussion Starter #10
There is a chart online that tells what speedo gear you need in relation to tire size and gear combo. I can't link it from my iPhone. Sorry
As a short term precaution I was just hoping someone had a rough idea through experience till I can get the gear swapped out.
 

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I just put 10.5x31" 15 GY Wrangler Duratracs on my 4.0 2000 Sport. Its a daily driver that only commutes. What pressure should I have?
 

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Jerry Bransford said:
Yes, that pressure is something that would be appropriate on a smaller tire like a 30". For a 33x12.50 tire, 26-28 is about right. For a 33x10.50, I'd run 27-28.
Glad I checked. Thought I was running 32psi. I was at 35psi. Now at 27psi.
 
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