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Tire size difference

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Old Sep 5, 2018 | 10:19 PM
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Default Tire size difference

Hey guys. Wrecked a tire today and need to replace it. I have the 4.7 4x4. Tire shop guys saying I should replace all 4. I just want to do one. Since the other 3 are relatively new. How much of a different in tire size can these 4x4 take.
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Old Sep 6, 2018 | 07:59 AM
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None. All four tires MUST be the SAME size. Otherwise, things break.
 
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Old Sep 6, 2018 | 08:24 AM
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Well I think there has to be some tolerance. Otherwise there'd be a lot more busted 4x4's since if not properly rotated/inflated tread patterns would wear unevenly causing small differences in overall diameter.
My second gen Ram had a 1/8"-1/4" difference front to back and I ran it like that trouble free for years.
I appreciate your reply. Curious if anyone else has any other advice
 
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Old Sep 6, 2018 | 08:26 AM
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To clarify I am talking about running the same sized tire. Just with less wear obviously causing a small difference in overall diameter
 
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Old Sep 6, 2018 | 08:56 AM
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I do not consider an inch a 'small difference' when it comes to different size tires on an LSD axle. Yes, running your tires at different pressures can, and will, alter the tire effective diameter, it will also munch up clutches in your LSD a lot faster.

A tire store put two new tires on the wifes AWD van. They were less than an inch in diameter different, and within 500 miles, the center diff in the t-case destroyed itself. The van was high mileage, so, proving the tire store was at fault for the failure just wasn't going to happen, so, I let it go. (but, I DID let the folks at the tire store know they had screwed up.) It had been running fine right up until that point.

It's your truck, do what you want with it. And when it fails, you will know why.
 
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Old Sep 6, 2018 | 09:46 AM
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Originally Posted by HeyYou
I do not consider an inch a 'small difference' when it comes to different size tires on an LSD axle. Yes, running your tires at different pressures can, and will, alter the tire effective diameter, it will also munch up clutches in your LSD a lot faster.

A tire store put two new tires on the wifes AWD van. They were less than an inch in diameter different, and within 500 miles, the center diff in the t-case destroyed itself. The van was high mileage, so, proving the tire store was at fault for the failure just wasn't going to happen, so, I let it go. (but, I DID let the folks at the tire store know they had screwed up.) It had been running fine right up until that point.

It's your truck, do what you want with it. And when it fails, you will know why.
who said anything about an inch?
maybr re-read what I wrote.
 
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Old Sep 6, 2018 | 10:13 AM
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The mechanics of your wife's full time AWD operate a lot differently then our part time 4x4's as well.
 
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Old Sep 6, 2018 | 10:39 AM
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I'm pretty sure you have an open diff, most Dakota's do. Put the new tire in the rear, it should be fine. Maybe do a one wheel wonder burn out with the new tire to even them up.
 
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Old Sep 6, 2018 | 11:04 AM
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Originally Posted by jkeaton
I'm pretty sure you have an open diff, most Dakota's do. Put the new tire in the rear, it should be fine. Maybe do a one wheel wonder burn out with the new tire to even them up.
lol that's kinda what I was thinking. I'm gonna go ahead with the one tire. Difference looks to be less than 1/8"
 
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Old Sep 6, 2018 | 11:26 AM
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A good tire shop can shave the new tire down a bit to match the tread depth of your current tires.
 
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