Why does putting a 17" wheel on your car make the speedo inaccurate?waldoz said:Could use a little more tune, I have not dug into the car yet though. I would like something that is not too big on the car. My roads are pretty good around here so , no lower than 45s . If the rims look really good I could go to 17s. I mainly want to stay around 15 or so. I also did not see the weight on stock rims so I don't really have anything to compare them with. I have never bent any 17s on any of the cars I have had so I am pretty good about that. My only thing is I don't like the speedo off, that drives me nuts.