if you are going to stay with your factory rims.....just a tidbit I learned.
Dodge specifically made the 20" Alloy rims, 9.5" wide.
Not 20x7's like the aftermarket 20" tires fit.
If you want new tires....the choices are limited to what will properly fit the factory 20" rim.
Our trucks come with 275/60/20 radials.
Michelin and Goodyear offer the only OEM matching size.
I priced the Michelins and they were $1300 mounted and balanced.
I priced the Goodyears and they were $1225 m/b.
I ended up going with a full set of Pirelli Scorpion ATR ORWL 60K tires.
They are 275/55/20 and cost me $800 m/b.
They are .25" shorter than the factory 275/60/20 and end up giving a 60 mph corrected MPH at 58.9 for a difference of -1.2 mph at 60.
I have not looked into finding out if the PCM can be recalibrated for the slightly shorter tire.
Thats what I learned through my late model truck tire experience.
Good Luck. I'll get a pic up later when I wash that dusty,
Dirty Black Hemi Ram.