[UKjohnnycobra]

The tires are 235 45 17 so are fairly low profile and I am sure the tire guy said they are "out of round". It hasn't always been a problem its just that one day I noticed it and it hasn't gone away. It does not improve with warming up either. The rear bearings are good and the rear brakes are drums (don't ask!). The drive shaft is balanced although I have not tested it to see if it is "true". I can t really change out the front and rear wheels as they are significantly different widths. I am going to get the wheels checked again.....

thanks for the comments everyone.