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Old 06-09-2020, 02:22 PM   #1
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Brand: Thor Motor Coach
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THOR #5837
Tire tread scalloping

On my Chateau class C (Ford E450 chassis), the right front tire has a strange scalloping wear pattern. I've attached a photo, but it's a little hard to see in a picture.


I had an alignment done last year, and it has new Bilstein HD shocks. The RV has 35k miles on it, and I don't think any of the suspension components are worn. It drives fine on the highway -- no pulling or vibrations.


Any idea what could be causing this?
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Old 06-09-2020, 02:27 PM   #2
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THOR #7035
Scalloping is normally caused by worn shocks but it can be cause by any component that allows the wheel/tire assembly to easily move: ball joints, control arm bushings, etc.
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Old 06-09-2020, 02:33 PM   #3
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Scalloping is normally caused by worn shocks but it can be cause by any component that allows the wheel/tire assembly to easily move: ball joints, control arm bushings, etc.

Yes, but the shocks are new and the RV is only a couple of years old.
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Old 06-09-2020, 02:35 PM   #4
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Originally Posted by jabrabu View Post
Yes, but the shocks are new and the RV is only a couple of years old.
So you're saying it's not normal for these new shocks to be bad or the front end components to be bad after such a short time?

It's also not normal for the tire to be scalloping.
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Old 06-09-2020, 09:29 PM   #5
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Scalloping or cupping can also be caused by wheel balance. This article may help.
https://itstillruns.com/causes-cuppi...s-5509983.html
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