I had a new tire put on my Vegas at 10,250 miles. They replaced the stock dunlop bias ply tire with a Dunlop radial. Now at high speeds (80-90 mph) I get a bit of a wobble that gets worse if I move my feet to the rear pegs.
Could this be caused by the radial tire?
The tire shop said that it was fine to mix radials with bias ply tires as long as the radial was on the back and the bias ply was on the front. Does anyone know for sure?

Could this be caused by the radial tire?
The tire shop said that it was fine to mix radials with bias ply tires as long as the radial was on the back and the bias ply was on the front. Does anyone know for sure?