[burnin oil]

You may want to check the cost of tires before making that decision. One of my trucks has factory 19.5s and decent imports like kumho are pushing $400 a piece for a non highway tread. I know that there are some light duty tires making it to market now for the diesel truck crowd but last I checked they were pretty expensive also. My 5500 is averaging 20k miles a set and has had kumho, Hankook, and Goodyears on it and is due for set number 4 at 80k miles. This truck does wiegh 12k pounds empty. I want out from under the 19.5s but semi tires are my only option and wheel adapters are over a grand themselves and tires are around $600 each. The p30 rims are usually expensive when you can find them. Good luck.