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1996 Mustang GT Convertible. Had factory 16" wheels and tires. Bought a set of the factory 17" GT/Cobra 10 spoke wheels and added new tires. Will the difference between the 16" versus the 17" wheels cause a difference in the speedometer? Appears to be a 5-6mph difference (e.g. shows doing 80, only really doing 74-75).How would one go about getting something like this re-calibrated?
Thank you! gjt