car shakes or shimmies when cold

[pci_raid]

My vette has a "shake" when cold in the front end since the day I bought it. Everything in the front end looks Ok. It doesn't seem to be engine/rpm sensitve So i kind of ruled out the engine. ( Pushing in the clutch or shifting to neutral makes no diff. in shake.)
But it is very pronounced when dead cold ie: sitting overnight. once it warms up , by that I mean driving it around its OK. I was told it's that yoko's take a set over night and need to warm up to straighten out. Is this correct? I have changed tires to Yokahama AS100, they were Yoko a520's prior. Any ideas? Does anybody else encounter this with Yokohama's?
It's not a big issue as it does smooth right out after about 4 or 5 minutes of driving.
Bob

 

[Goose]

my 95 does the same thing, I have kumho tires which do it a little worse than the michelins I had on it before, but it is just the tires, mine get flat spots from sitting as little as over night but smooth out with about five to six miles of driving.

Goose

 

[Vette_Newb2]

My 89 does it too, I have Continetal Conti-Trac tires... but mine does set for 3-5 days at a time. Clears up as soon as the tires get warm.

 

[Daryllawman]

Its the tires......

 

[pci_raid]

I thought it was just wanted to double check!