please help. apprx how long does it take for them to form? my car has been sitting idle for 1.5 months. please help asap.

 

It greatly depends on the tire type and construction, there is no one rule that fits all. Put your car in neutral and roll it a foot or so - it will help. But you won't know until you drive it again.

 

I don't know how long it takes to form but its happened to me. My car was in the showroom for over a month without being moved and you can feel the vibration at 60 MPH. I tried everything but replacing them, what a pain in the ass considering there new Goodyears that the dealor put on when he took the car on trade. I figure I'll just put up with it till I can throw some new rims on.

 

If they are the stock Michelins, I don't think you will have much to worry about. Strannik has a good point. You also might be able to get them balanced.

My car sits for two to three weeks at a time. I have Yoko dB's and have had no trouble to date.