You guys are all full of s*it. Couldn't possibly be bad tire, OH NO! You must have been mesmerized by the huge colored poster in the tire shops that Pictured the various problems with tires, not one problem was caused by a badly made tire, they were all your fault for not taking better care of your car. An honest dealer will replace the tire at no cost. I had flat spots on my Goodyear Polyglas tires on my 70 442 in the early 70's. Switched to the first BF Goodrich radail TA's, problem solved. Bought a 74 Olds Cutlass with almost new Goodyear radials from Sears that showed cupping. Went to Sears tire store, they said it needed shocks, showed them receipt for shocks from Sears with only 15,000 miles on them, was he embarresed. Bob Zawarski
----- Original Message ----- From: "Lon Stowell" Newsgroups: rec.autos.tech Sent: Thursday, August 14, 2003 3:53 PM Subject: Re: What makes rear tires "cupped"
Approximately 8/14/03 06:29, M.Burns uttered for posterity:
>
> > What makes rear tires "cupped" on outside or inside edge?
> > (I believe they've been on the rear the entire time)
> > They are on a Dodge minivan with a solid rear axle, so I wouldn't think
> > there would be any alignment to deal with. Rear doesn't bounce, so don't
> > believe it would be shocks.
>
> Unless you are built like "Refrigerator" Perry, it is impossible
> to properly test shocks with a simple bounce test. You just
> don't weigh enough to put enough force on them to even begin to
> simulate the weight shift of your vehicle.
>
> Try backing up in an open area then hit the brakes hard to check > rear shocks.
>
> > They tread is still good, but they are so noisy I've got to replace them.
>
> Worn suspension, worn shocks usual cause, severely out of balance
> another. Shocks highest on suspicion list, but also check for
> excessive play in the rear suspension. It usually also takes
> poor alignement to cup the inner or outer edge, if the alignment
> is good but the shocks [or similar] are bad, the cupping tends
> to be along the middle. Have a tire guy take a look to see if
> they are more feathered than cupped... that would be alignment. >
>