I have an Audi A3 1.9 TDIe. I recently felt strong vibration from the back of my car at a speed of 80mph when I tried to overtake cars on M4. The vibration never appear for a speed below 80 mph and the fuel consumption is normal 5.5L/100km. The first reason I can think of is the balance of my rear wheel are not properly done after I replace my OSF tyre. Therefore, I went back to the blackcircle premier garage where I got my OSF tyre replaced and told them the problem. However, I mistakenly told them I changed my NSF tyre there and felt vibration at 80mph. They remove the NSF tyre and wheel and have a careful check and told me the NSF wheel is buckled. They show me that putting the NSF tyre and wheel on an equipment and rotating the wheel a bit and the display on top of the equipment shows a reading of weight, the right side is about 50g heavier than the left. They told me this could happen when I run over potholes at high speed. Does that mean the wheel is buckled? I am wondering if there will be some other reasons that can cause the vibration at 80mph. Does anyone know about a good wheel refurbished garage in Bristol and how much it will be to refurbish a buckled wheel? I can buy a new genuin audi 16 inch 6 arm alloy wheel at 148 pounds from alloywheelsdirect. If the refurbish cost is more than that, I would go for a new alloy wheel.