Both my Tours are optimistic by about 5% according to my GPS receiver.

WTF is up with that? What size of tire were the speedos calibrated on? Whatever they were, they're not what I have on my SE or SVT! :rolleyes:


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Sidewinder: 1999 SVT
Thud: 1998 SE V-6
Edgecrusher: 1998 Mercury Mountaineer, 5.0L