Thanks Mark:

I guess I am not alone - I think Continental Contacts are known for this.

Marshall Ruskin

>Well, I posted the list a few weeks ago about the exact same
>thing....someone replied to check each tire very carefully.  I pulled the
>tires one by one, and sure enough found the right rear had a major
misformed
>tread area.  Looked like a belt inside the tire busted or some other
>catastrophic occurance.  Anyway, check each tire very carefully, you may
>even need to run your hand over the tread surface as well as the sidewall.
>Worked for me.
>
>Mark
>
>
>>That's what I feel when I drive - Thump Thump Thump - I am running out of
>>ideas.....
>>
>>It's Speed related, (feel it when slow or fast, just thumps faster)
doesn't
>>appear to be a separated tire, front ball-joints OK.
>>
>