Quote:
Originally Posted by tarzan_nojane
Seems backwards. The manufacturers do not want to be liable for you going over the speed limit. When stock tires are new tires, the speedometer should read 2-3% higher than actual. When I put new 225/45R17 tires on my car, the speedo was then pretty accurate at 60mph
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You're right, it should be the other way around. OP has not confirmed wheel/tire size, if he has bigger diameter tires vs stock that would cause his issue of car speedo being lower than gps speedo.