[UKjohnnycobra]

Mine are radials. I made the problem go away by having the tyres shaved and balanced as posted earlier, as driving them was not making it any better. It did seem to coincide with using the dollies, but I can't prove cause and effect. In future I am going to use the dollies to position the car in the garage (I need to keep it tight against the back wall to get the other cars in for winter), and then use the floor jack to lift the car enough to slide the dollies out. Of course it will be a major PIA if I want to get the car out for a winters drive......