It appears that the stock 20" wheel tire package is about 2" tall than the stock 17" package. Any idea how much that affects the speedo? Can the dodge garage set the speedo for a reasonable cost? Anyone had this done?

 

I have a 2005 4x4 Hemi. I swapped my stock 17's for some aftermarket 20's. I could tell the difference right away. It was harder to get a burnout. I then purchased a Superchip for my truck, and set the tire size. I now peel out like there were 17's back on the truck. Of course, $200.00 a tire stops me from peeling out as much!!