Quote:
Originally Posted by awesomebob
My speedometer reads 65mph, and my GPS reads 60mph. Can I buy a device to correct this or does someone know a good shop in Torrance CA.
Thank you. 
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Yes, it's called Discount Tire.
But first check for the correct rear tire size, tire wear level, and proper inflation.
+/- 5 MPH at ~60MPH might be as close as you can get throughout the tread life of the rear tires.