Hi, just had new Yokohama C drives fitted all round my 4/4, soft wall tyre at low speed has really improved the ride, but at 68mph and above getting severe steering wheel vibration.....checked pressures all ok, balancing do you think or some to her issue ?
My experience with a Morgan was and is that after 15K to 20 K km the wheel bearings urgently need a check. On my Roadster the front wheel bearings were so slack you could hear the click clack when shaking the wheel. After the bearing job the road holding improved significantly and steering vibration was gone. Just a guess as you use the description vibration and not issues like out of round hits.
A loose bearing is like a dirty window or a worn vinyl player stylus. The changes are constantly happening but the awareness can be a sudden moment. This experience could be forced by getting new tyres.
