"Cupping" is normally caused by worn shocks. "Feathering" or "Fish Scale"
is normally caused by the Toe adjustment being out of whack.
Have the dealer check your shocks/alignment and have them replace the
tires. 13K miles is not what I would call acceptable wear...cupping
normally takes about 5K mile to wear the tires really bad.
- Bernd
At 03:22 PM 09/20/1999 -0500, you wrote:
>I just found out from the dealership that my tires are cupped. Not too bad,
>but still annoying to hear while driving. I only have 13,000 miles on them,
>rotated them at 10,000. I keep the pressure at 35 psi, and I measure after
>driving 5 miles to the gas station after it's been sitting overnight.
>
>Now that the cupping has happened, is there any way I can get rid of it,
>possibly by changing the air pressure and wearing the ridges down? I would
>really hate to have to buy new tires this early. I had this happen once
>with a Fjord Ranger also with Goodyear Wrangler GSA Is this common with
>trucks? Am I doing something wrong?
>
>BTW, I have the 31x10.5R15 tires.
>
>
>Thanks!
>
>Chris
>'99 Dakota Sport + CC 4x4 3.9L Amethyst
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