My Speedo is off
I Found When I Am Driving Above Posted Speeds I Get Past A Lot More Than I Should. I Finally Brought Several Gps Units And Confirmed That The Car Over Reads My Speed By 5 Km/hr. I Think This Is Significant. I Wonder If The Odometer Over Reads As Well Racking Up Higher Milage Than I Shoud Be.
I Have Stock Tire Size And Rims On The Car. What Could Cause This?
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2011 Z4 35is
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