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Unread 07-01-2013, 02:50 PM   #16
Imped
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Quote:
Originally Posted by rambo3489 View Post
Don't you want to get even wear?
Shall I take some pictures of both sets? I am religious when it comes to tire wear, rotations and pressure.

I'll say it again--14 psi is too damn low. What about that isn't making sense?

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Unread 07-01-2013, 03:00 PM   #17
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How is it wearing even? Do you take corners at 90? Also tjs can be close to 1000 pounds heavier. Also how are you positive on the psi without even seeing it or not even having the same size tire or jeep combo?

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Unread 07-01-2013, 03:10 PM   #18
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Quote:
Originally Posted by Imped View Post
Shall I take some pictures of both sets? I am religious when it comes to tire wear, rotations and pressure.

I'll say it again--14 psi is too damn low. What about that isn't making sense?
OK. Here we go. Hope you can take it. Hey man, I was asking you for some good tech info as to why the chalk test doesn't work in all situations. All I got out of you was, "Well I run 24 psi in my rig and that's what everyone should run."

Well guess what. Not all jeeps and conditions are created equal. That's right they can weigh different amounts. I had 25 PSI in the tires to start did the chalk test and had chalk on the outer 1/3 of the tire on either side. Am I correct here Maertz? So to me that says WHOA!! let some pressure out of me or I'm gonna turn into a bald guy trying to sport a comb-over.

I'm not saying that 14 is what I absolutely should be running but that's what the chalk test said was good for ME.
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Unread 07-01-2013, 03:11 PM   #19
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Quote:
Originally Posted by Maertz View Post
How is it wearing even? Do you take corners at 90? Also tjs can be close to 1000 pounds heavier. Also how are you positive on the psi without even seeing it or not even having the same size tire tire or jeep combo?

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Unread 07-01-2013, 03:15 PM   #20
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Correct both outer lugs were not even touching on corners... Also your extra light with no bumper winch and all that yet. But hey hes got 17k posts lets air them up and ride it on 25 percent of the tread

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Unread 07-01-2013, 03:21 PM   #21
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He is 100% correct that 25 area is the right the psi with 35" MTRs. BTDT. The chalk test leads to underinflation results with large tires with big side lugs.
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Unread 07-01-2013, 03:22 PM   #22
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im no tire expert by no means but wouldnt different load range tires be different on the same vehical. lets say load range c on a 3000pound jeep runs correctly at 30 psi but if you were to go to load range e wouldnt the tire pressure be drastically lower on the same jeep?? teach me.. i know nothing when it comes to load range and all that
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Unread 07-01-2013, 03:25 PM   #23
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im no tire expert by no means but wouldnt different load range tires be different on the same vehical. lets say load range c on a 3000pound jeep runs correctly at 30 psi but if you were to go to load range e wouldnt the tire pressure be drastically lower on the same jeep?? teach me.. i know nothing when it comes to load range and all that
Thats correct but these should be the same load range only variable is the jeep weight

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Unread 07-01-2013, 03:26 PM   #24
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The chalk test is only useful to an extent. I have run 35" and 37" MTR/K's on a lightweight TJ. I ran the 35's at 24 psi in the rear and 26 psi up front. 14 is way too low, despite what the chalk test tells you. As for noise, no worries. After a few thousand miles and a rotation or two, they'll pick up.
Ya 14 is too low. I'm usually around 23 or 24, which ever number I hit first when airing up.
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Unread 07-01-2013, 03:39 PM   #25
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To an extent = not on large, wide, knobby tires with a wheel:tire width ratio of 2/3. The larger the disparity between wheel and tire width, the more useless the chalk test is. You will get good tire wear on your tires in the 23-26 psi range and 3k mile rotations. I've got ~40k miles on Kevlars alone and they've all worn beautifully.

Your YJ doesn't weigh 1k lb less.....that's absurd.

Anything else I can help you pair of geniuses with?
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Unread 07-01-2013, 03:47 PM   #26
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Imped. Thank you. Ill run somewhere in the low 20's. But if your wrong I'll burn your house to the ground in 25,000 miles.

Maertz your still an idiot.
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Unread 07-01-2013, 03:49 PM   #27
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Quote:
Originally Posted by Imped View Post
To an extent = not on large, wide, knobby tires with a wheel:tire width ratio of 2/3. The larger the disparity between wheel and tire width, the more useless the chalk test is. You will get good tire wear on your tires in the 23-26 psi range and 3k mile rotations. I've got ~40k miles on Kevlars alone and they've all worn beautifully.

Your YJ doesn't weigh 1k lb less.....that's absurd.

Anything else I can help you pair of geniuses with?
It could be close to 1k as just off the stock vehicle weight can be 800lbs more and if you have a winch or front bumper there's probably your other 200 lbs

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Unread 07-01-2013, 03:55 PM   #28
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Ur an idiot. Let the pros handle this one. Despite what we think we're still pretty green in the wheeling world.

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I run about 26psi in mine. 14psi is way too low and with enough corners you will lose the side lugs.. Mine have over 20k on them and besides all the chunks from rocks, are wearing perfectly even. I can imagine your jeep probably isn't driving all that well with that low of a pressure in them either.
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Unread 07-01-2013, 03:58 PM   #29
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Originally Posted by Maertz View Post
It could be close to 1k as just off the stock vehicle weight can be 800lbs more and if you have a winch or front bumper there's probably your other 200 lbs

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Unread 07-01-2013, 04:00 PM   #30
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Originally Posted by ssquier92 View Post
I run about 26psi in mine. 14psi is way too low and with enough corners you will lose the side lugs.. Mine have over 20k on them and besides all the chunks from rocks, are wearing perfectly even. I can imagine your jeep probably isn't driving all that well with that low of a pressure in them either.
Yea. But its not from the low pressure. Its from the spool.
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