what psi to inflate to?! - JeepForum.com
 
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post #1 of 8 Old 05-25-2005, 09:16 AM Thread Starter
paroxysym
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what psi to inflate to?!

im getting bfg m/t's in a 31x10.50. what psi should i be at when im cruising aroundon the streets? i dont know if the tire place will inflate them right. usually they over-inflate them. what would you recommend?


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post #2 of 8 Old 05-25-2005, 09:30 AM
denverd0n
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Do a search for chalk test.
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post #3 of 8 Old 05-27-2005, 11:09 PM
Jerry Bransford
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31 to 33 psi is pretty good for that size tire.

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post #4 of 8 Old 05-28-2005, 08:36 AM
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what's wrong with the psi that's printed on the tire?

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post #5 of 8 Old 05-28-2005, 09:53 AM
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Quote:
Originally Posted by hoosier724
what's wrong with the psi that's printed on the tire?

thats the max pressure they should ever be run at. (i think).......

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post #6 of 8 Old 05-28-2005, 10:02 AM
BigWaylon
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Quote:
Originally Posted by hoosier724
what's wrong with the psi that's printed on the tire?

it's the MAX pressure, and only if you have the MAX weight on them...


my 32x11.50's are rated for MAX 2535lbs @ 50PSI

my 36x13.50's are rated for MAX 2810 lbs @ 30PSI

multiply those by four (number of tires) and the Jeep would need to weigh 10140lbs or 11240lbs to need the pressure listed...

since your Jeep weighs less than half of that, you definitely don't need that much air...

I have my 36's at around 20PSI for the road, and my 32's are just below 30PSI...

if you'll look at the decal that's probably in your driver's side door jamb, you'll see the recommended pressure for the stock tires...and it's WELL below the MAX pressure on the sidewall...

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post #7 of 8 Old 05-28-2005, 10:43 AM
Jerry Bransford
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Simply put, that maximum pressure molded onto a tire's sidewall is only for use when the tire is supporting its maximum designed for allowable weight. Since tires seldom (and never in a Jeep's case) support their maximum allowed weight, they should seldom (never in a Jeep's case) be inflated to that pressure.

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post #8 of 8 Old 06-07-2005, 10:34 AM Thread Starter
paroxysym
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im currently running my mud-terrains at 28 psi, maybe a hair above that. is that fine? i didnt do the chalk test. all i know is its better than the 36 psi that NTB inflated them to.

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