My problem is this: The speedometer of my Volvo V70 2.4i (170hp), matured with 195/65 R15 on original aluminums from Volvo, is not exactly accurate. Example: If the speedometer shows exactly 130km/h, I actually only drive 117km/h (measured with GPS!), which, I think, is a very big difference. For comparison: With my Corsa C 1.0, the speedometer deviation is 140km/h a uf the tacho not even 5km/h! Since I bought the car used, I don’t know what kind of wheels were mounted before. Therefore my final question: What can be done and what would a “repair” cost? I have already read in the other articles that it is probably an electronic problem. I will not want to fix it myself, because I have no idea of electronics! I am grateful for answers of all kinds, eintrachtloewe