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Old 01-18-2011, 07:54 PM
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what M/T?

I just got the kumho road venture m/t and this is the first mud tire I have ever ran. The max psi is 85 just like my last road tires. I ran the old tires at 65 psi but wasnt sure if i should run these at the same or not to get the most tread life . I would bump up the air for the 5th wheel tow but that is only a coupl eof times a year. Im sure this will be a silly question for some to read but as I say this is my first mud tire and thats a chunk of change to put out for me to go ruin these with the wrong psi. Thanks for any help
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Old 01-19-2011, 01:49 AM
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Same thing for the street. Keep them aired properly, balanced, your truck properly aligned, and rotate frequently.
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Old 01-19-2011, 05:48 AM
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Run them at 80 psig for maximum tread life. My OEM Goodyears lasted 80k miles and always kept them 75 to 80 psig.
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Old 01-19-2011, 06:12 AM
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Quote:
Originally Posted by bismic View Post
Run them at 80 psig for maximum tread life. My OEM Goodyears lasted 80k miles and always kept them 75 to 80 psig.
I had Goodyear Wrangler SR-T's on my Ram.... 60psi front 70psi rear.... well, the middle tread was significantly worn in a year. (Over-inflated.) Yes, 60/70 was what the factory sticker said. After that, I ran 50psi in both....but was pretty pissed due to the uneven wear.
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Old 01-19-2011, 07:41 AM
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I've always run my tires at max PSI and never had uneven wear. Ride quality suffers but you get more mileage and longer tire life.
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Old 01-19-2011, 07:50 AM
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The reason your seeing such high tire pressures in the Mud tire is because when your mudden you lower the air pressure for more tire coverage and traction. Same as you do in rock crawling and sand driving.

In order for the tire to do that well it has to be thicker to handle the stress of low pressure operation.

Now on the flip side that same thickness is whats causing you to need more tire pressure on the street because now you need a full even contact patch on the pavement or you wear the tire wrong.

I have some Kumho tires but there ATs and they only ask for 50 psi. Already i got some feathering on the front outter most treads at 15K on the tires. IDK why because i keep them at 50psi but tires wear fast when theres any issue at all out of spec.
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Old 01-19-2011, 10:19 AM
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Quote:
Originally Posted by ToMang07 View Post
I had Goodyear Wrangler SR-T's on my Ram.... 60psi front 70psi rear.... well, the middle tread was significantly worn in a year. (Over-inflated.) Yes, 60/70 was what the factory sticker said. After that, I ran 50psi in both....but was pretty pissed due to the uneven wear.
As I said, I ran mine "at or near max". No uneven wear, no unusual "middle tread wear".

I have heard multiple times that keeping the tire at 70 psig+ would cause uneven tread wear, but 80k miles and mine didn't. I do not believe that my experience is all that unusual or that my tires were any different than all the other Wranglers out there.

I could have probably got 90k out of the tires, but i was heading into winter and the potential for ice, so i decided to be conservative.

Last edited by bismic; 01-19-2011 at 10:23 AM.
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Old 01-19-2011, 10:22 AM
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Originally Posted by obsidian View Post
I've always run my tires at max PSI and never had uneven wear. Ride quality suffers but you get more mileage and longer tire life.
That is a fact!! A guy I hunt with quit riding with me. Because of my tire pressure and the bad "back roads" we have. He said my truck gave his hemorrhoids hemorrhoids.
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Old 01-19-2011, 12:54 PM
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thanks for all the info guys. Like I said i always ran my last steet tires at 65 psi and i got 70k miles out of them. The mud tire is new to me so i didnt know if you should normally run them at high psi or what but it sounds like i should. When i aired my street tires over the 65 psi it really got harsh and I wasnt getting any uneven wear so I knew it was ok but the lugs are so high on these that i wasnt sure how to run them. right now i have them at 70 psi and they really are a softer ride than the street ones at 65 psi.
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Old 01-19-2011, 01:02 PM
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I agree with running as much pressure as your tires will allow, especially up front where all the weight is. Typically, your front tires wear around the outer edges quicker and your rear tires wear in the middle faster. Rotations are important for maximum tread life, especially if you run wider than stock tires. My $.02.
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