I just went back from 19.5's to OEM 17". I purchased a 2007 F350 dually with a set of 19.5 Vision rims. They really made the truck stand out. Only problem then was the tread noise. The tread was a bit aggressive and really setup a harmonic singing that would drive you crazy on long trips. My poor Boxer would start howling it was so bad. The ride was fine but I couldn't stand the noise. So I decided to find a set of tires that wouldn't be so noisy. I found a set of Bridgestone M729F 245/70R19.5's. They sounded better, but the ride went to crap. At first I thought it was balancing issues. But after trying everything under the sun. I finally decided the tires were just too heavy for the truck. I'm fairly sure the first set was 12 or 14 ply. The Bridgestone's I bought are load range H -16 ply. This was most likely my mistake. Anyway after dealing with this all summer I found a set of Factory takeoff - OEM's to put on the truck. All is good, except the truck doesn't look as sharp as with the 19.5's. I now have the whole set up for sale with almost like new tires with less that 3,ooo miles.