Join Date: Oct 2001
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Re: tires cupping, bad shocks???
Well, a little late on this Broncomania, but I'm thinking two main possibilities, 1) it is your front end messing them up to begin with, and then you rotate them to the rear (now they are already worn at this point, on the inside, from a bit too much front Negative camber), and I recall WD-40 saying once that although they are still rotating the same direction (you swapped front to rear only, not side to side), the force being applied is different. i.e. front force on tires occurs in braking, rear tire force is in acceleration. So, now your inside worn tires begin to show this cupping due to this change in force on the tire.
2) far more remote possibility, but you should check your rear axle for straightness. A bent axle housing (tubes bent very slightly up on both sides, possibly from being overloaded) can cause this. [img]images/graemlins/shocked.gif[/img]
I'm thinking #1 is more the culprit though.