Does anybody have the correct sizing on the 33x12.5's? The sizing in the Edge Evolution book is too small. I figured I'de save myself some time and chalk and ask around the forum.

thanks fella's~Pizzle

 

I used the recommended setting in the Edge book for 33" tires.My speedometer is only off by 1-2mph from my Edge at highway speeds.FWIW I have 33" Terra Grapplers.That's close enough for me.

 

You have to play with the setting to get it perfect. I think I programed my Superchips for 34.5 inch tires to get my speedo correct with my 35's.

 

Ya, I'm about 4-5 off from my speedo. I'll reply on this thread when I get it perfect. This may take a few days considering I try to not drive my truck the 60 mile round trip to work. Much cheaper to drive the rice burner than the gas burner!