Oldgmc...I dont have much experience with tires, but my 19.5s are HUGE!...with the original GOODYEAR rubber on them, they measure about 34-35 inches across. Personally I like the look of the 17.5s on my bus, they fill the wheel well, nicely. I looked at your pics, are those the tires in the back of the truck? Good lookin tires, try them on your truck and see what you think, then imagine BIGGER (19.5s) And ask yourself, "what am I going for, with this truck?" restore, semi-restore, modded. You may decide the 17.5s are what you want.
