Hey guys, after reading numerous threads and searching a little bit I figured I'd post my own thread asking for some assistance. Yesterday I installed my edge evo cs on my 04 4.6. I entered my tire size 35/12.5/20 and gear size and figured I was set. Wrong. My speedometer is roughly 10-15 mph too fast. The edge speed and truck speedometer match pretty well, but according to my gps and speed compared to other drivers, it's way off. Any solutions to my issue? I don't see anywhere to enter my tire size in mm, just in inches? Thanks for any help or info on fixing this.

 

Anyone??

 

you probably have the height too high. Go to the Wheel and tire section in the Atermarket product &review and check the sticky. They have the formula to get the correct size. I'm running 285/70/17s. That equals 32.7 " average. Turns out my size is closer to 32 1/4 " i'm right on mine. Good Luck

 

Changed the height to 33.6 ", speedometer is still way too high.