Thread: Speed Calibration and Gryphon
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Old Wed, April 8th, 2009, 05:29 PM
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Jackpine Jackpine is offline
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Quote:
Originally Posted by Desert Racer View Post
Forgot to mention I changed the factory computer tire size to 275/70/17 would that make a difference? I put on a 265/60/18 and my speedo is off by 2 under 65 and off by 5 above 65mph.
Now I'm really confused! First, what is the size of the tires on your truck? Are they 275/70R17s or 265/60R18s?

Next, what do you mean when you say you "changed the factory computer tire size"? The ONLY thing you can put into the Gryphon is the tire circumference - in millimeters.

And last, you didn't really just swap ONE tire did you? Because, when you say "I put on a 265/60/18 and....", that's what it sounds like!

- Jack