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Old 05-04-2020, 09:20 PM #1
Bigfoot Bigfoot is offline
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Tires Cupping

Hi all,

I took my 13 4Runner in for its 100k service recently and the tech noted that the tires were cupping. Some uneven tire wear was expected (the tires were near their end of life and I was bad about rotating for the last 10-15k miles), but cupping was a bit of a surprise.

My question is whether the cupping issue was likely just from my failure to rotate the tires?

I put a new set of AT3s on the truck for unrelated reasons (nail in unrepairable area + near end of treadlife) and Id like to avoid a recurrence of the cupping problem. The truck tracks well so I wasnt planning on getting an alignment done, but Im reconsidering. Most of what I read about cupping points to alignment issues (and not failure to rotate) as the usual cause of cupping. Does that sound right?

Thanks!
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Old 05-04-2020, 09:34 PM #2
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Just because it drives fine doesn't mean alignment isn't out of whack.

Think of it this way. You want to pay for alignment or new tires? Depending on road conditions you might want to get alignment sooner than later. My wifes Highlander we paid for the lifetime alignment at Firestone and I use that shit yearly.

Too bad it doesn't apply to vehicles with modded suspension so the 4R is out.
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Old 05-05-2020, 07:09 PM #3
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in addition to alignment, worn shocks and/or suspension parts may also be the culprit.
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Old 05-12-2020, 09:59 PM #4
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Quote:
Originally Posted by Bigfoot View Post
Hi all,

I took my 13 4Runner in for its 100k service recently and the tech noted that the tires were cupping. Some uneven tire wear was expected (the tires were near their end of life and I was bad about rotating for the last 10-15k miles), but cupping was a bit of a surprise.

My question is whether the cupping issue was likely just from my failure to rotate the tires?

I put a new set of AT3s on the truck for unrelated reasons (nail in unrepairable area + near end of treadlife) and Id like to avoid a recurrence of the cupping problem. The truck tracks well so I wasnt planning on getting an alignment done, but Im reconsidering. Most of what I read about cupping points to alignment issues (and not failure to rotate) as the usual cause of cupping. Does that sound right?

Thanks!
Is it lifted? If so what method and how tall?

Have you ever had it aligned? Do you have those specs?

Ever replaced the shocks / Struts? If so what brand?

How many miles did you get out of your last set of tires?

Anything else you can tell us?
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Old 05-13-2020, 12:14 AM #5
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Quote:
Originally Posted by 5thToy View Post
in addition to alignment, worn shocks and/or suspension parts may also be the culprit.
I bought my 4Runner with cupped tires and a very worn suspension. The tire tech said the same thing, the suspension was worn out and allowing the wheels to wear unevenly.

An alignment will help your new tires last longer though.
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Old 05-14-2020, 01:52 AM #6
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Check also the tie rod ends.
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