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Originally Posted by rick3000
I think the speedometer is separate from the odometer. I have one of those police speed signs by my house and I average +2-3. So when I am going 43MPH it says I am going 40MPH. But that could just be my car or the speed meter being off. No way to really now without taking it into a shop. My sister has a Mini and always tells me I go 5 under.
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I would not go by the police speed sign meter. Those things need to be re-calibrated every so often. Same as the cops radar/laser guns they use. They can be off by a few mph.
My speedometer and the digital read-out are in sink, but weather they are both off from true mph is another story. It could have allot to do with your wheel and tire set up too. Depends on how extreem you went with a plus size, like a set of 19s. Could make your readings off a little from the actual speed showing.