[s-cars] Odd S6 Vibes

[Jerry Scott]

I think that you will find that the vibration problem is not so much 
related to the durometer of the rubber compound, but rather to the type 
of rubber used in the tire.  When I worked for GM as an engineer, the 
tires that produced the most problems with flats spotting were those 
made with butyl compounds.  This is a high damping rate compound that 
will cold set and require heat to recover back to its original shape.
Jerry

Robert Rossato wrote:

> -------------- Original message ----------------------
>From: "David Cahill" <david.cahill at alum.dartmouth.org>
>
>  
>
>>Once the tires have warmed-up...voila...the problem goes away. I have no CV
>>issues. The vibration only occurs on my summer rubber- Conti Extreme
>>Contacts, which are anecdotally prone to flat spotting. (Ironically I never
>>get any vibration from my snow tires, which are Green Diamond Inaris).
>>    
>>
>
>Yup, this tends to be more of a performance tire issue.  Snow tires use much softer compounds and don't suffer from the same problem.
>
>Bob
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