Hi tabetha, I checked the dizzy appears fine. It is hard to say how sevre it is without seeing it for yourself, I think it is a balance problem because it only comes in between 3500 and 4000 then starts to fade away. I am experienced in the tyre trade, at it is like an out of balance fornt wheel, no vibration below 60mph, but starts to come in above 60mph - 75mph, then you can drive through it, sounds familier to my vibration. thanks Tabetha.