What's causing my rear tire wear?
I put new tires on last summer and the rears have really worn down already. Any suggestions on what it could be? The control arms don't appear to be bent but maybe the bushings are worn and let the axle shift? The truck drives straight and smooth, though. I don't hear any bearing noise either.
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Could you post a picture of the rear tire tread. It helps in determining the cause of the wear. What pressure do you run?
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Here's the left rear, right rear, and a front for comparison. There's definitely more wear on the outside of the tread. I run 32PSI but bumped it up a couple PSI once I noticed the wear, just to get a little more load on the center part of the tread.
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Have you rotated the tires since you purchased them?
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I don't drive very much so I haven't rotated them.
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That looks like classic ezcessive toe-in on both front tires.
Were these rotated off the front to the rear? If they have always been on the rear, not sure what cause is, I don't think rear toe is adjustable, but not sure how both hubs woild be out of alignment in the same toe-in manner. If the axle was that far out of alignment, you would have outer wear on 1 tire and inner wear on the other. |
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There is no way that those have been on the rear the whole time. If so you have some serious damage back there.
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Now you guys have me second guessing myself. I put these on at the same time I did FJ struts up front and I don't think I've had them off since then. I think I would have seen the same wear on the other two tires by now. The old tires I removed were mismatched front-rear but those rears were really worn out too.
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If you have been keeping the tire pressure at 32 PSI then I would suspect they come from the front to the rear. I would have a reputable shop check out your alignment.
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sometimes they will rotate the tires if they notice the fronts are wearing bad, or if they are just due for a rotate. especially if the tires are already off for another reason. I know here at the shop I have done that more than a few times. edit: even though the rear isn't adjustable, you can still have it checked. maybe the housing is bent. |
I've never had it to a shop. I think I should have the rear alignment checked to see what's up. Even if these were on the front, I had the alignment checked after doing the FJ springs and toe and camber were fine. They wanted to adjust caster but the adjusters are rusted solid.
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There is one other possibility: if the "toe" of his rear wheels is off, it could cause this kind of wear. If, his truck is leaning, it will cause the axle to sit ever-so-slightly off toe. I learned this yesterday, while getting my "post-Toytec-Ultimate-lift-install-alignment" completed. I had not installed the customary driver side spacer to offset the traditional 4th gen driver side "lean" and thus, caused the rear axle to be ever so slightly offset. My alignment guy said that installing the spacer (which I plan on doing this weekend), will remove most of the toe offset, which makes perfect sense. Either that, or I'm going to have to drop $320.00 on adjustable rear LCA's. Anyway, hope that helps.
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There is no alignment to check on the rear. There are no toe, camber, or caster adjustments to make. If those tires have been on the rear their entire life, then you probably have a bent axle. Has your truck ever been in a side impact?
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