Uhhhhhh...Originally Posted by Riff Raff
For example, my oversize tires (275/65R18) run about 5 MPH above my actual speedometer reading. So if the posted speed limit sign says 60 MPH, then I just put my speedometer needle on 55 MPH with no worries.
Math don't work that way Riff...
It's all about the %.
example: a .07% difference in tire size = these speedometer values...
55 = .07x55=3.85, so 55=58.85
60 = .07x60=4.20, so 60=64.2
65 = .07x65=4.55, so 65=69.55
and so on...
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