[UKjohnnycobra]

...at between 60 and 63 mph. Its coming form the rear of the car. It runs great at all other speeds. It feels like a wheel out of balance (they are Image wheels with a significant offset at the back) so I took it to the local shop and they balanced it up and told me that one of the tyres/wheels is slightly out of true (ie not circular) so maybe I have a flat spot.

So a question to the cream of mechanical intellect that posts on this board is: could a slight flat spot cause this? If I roll the wheels over a flat smooth floor they don't seem to hang up anywhere. All my UJ's and wheel bearings are good and everything is tight. The front end is vibration free. I really don't want to buy new tyres just to test if this is the cause.

Anybody have any experience with this?

Apologies to the Beach Boys BTW