Hello, I have noticed in the last few days that when driving at speeds between 60 and approx. 130 km/h vibrations on the steering wheel and also “under the rear” can be felt. I also have the feeling that the steering wheel “will give in” when starting and braking, even slightly cracks when braking. The tyres can’t actually be, they are new and balanced. Maybe the Stabis? Can I mount them myself? Expect high costs? Who can give me advice? Thank you and greetings Kjell