What is the cause of my Audi 80's shaking steering wheel at high speeds?

Whenever I drive at speeds above 60mph, I notice my Audi 80's steering wheel shaking uncontrollably. I've checked the tire pressure and alignment but everything seems to be fine. The shaking only happens at high speeds and not at lower speeds. What could be the cause of this issue?

It's possible that your wheels are not properly balanced. Unbalanced wheels can cause shaking at high speeds. I suggest taking your car to a mechanic to have the wheels balanced.