Hi there, I’m new here. Last week I bought a Miata Bj. 1990. Unfortunately I didn’t drive on the motorway during the test drive to test higher speeds. Today I found that from about 120 km/h the whole car gets a bit restless. Is that normal? Can this be due to the tires? Or do I have to worry about any broken bearings. Unfortunately I am not a screwdriver at all. Thanks already for tips. LG from AB