Hi folks;
I've been reading up on the edge programmer. It says that it "adjusts for tire size and gear ratio". Does that refer to the unit itself; or does it (or can it) adjust the speedo for different size tires? My speedo is off quite a bit due to the different size tires installed by Roush. I would like the factory speedo to be accurate. Any input on this would really be appreciated.
George

 

You adjust the pcm with the edge. The speedo is inaccurate about 2-3 mph off.

 

you can adjust the speed to match up with the larger tires so your speedo is "right on" again