I've got several trucks running 225-70-19. 5 tires... the same tire that's on an 08 5500 that we own. . as well as 3 of the 3500's... .
We get close to 100K miles on the steer tires, and about 90K miles on the rear re-caps...
We use the UPS all season tire by Bandag. Through the years we've ran a 00 F550, & a 01 3500 dually to 500K each before we sold them, currently we have an 04 with 300K miles. .
We use steel wheels that were made for the trucks, this has been the lowest cost per mile of any tire we've tried. . we've not has a blow out but a few nails over the years.
The small height difference corrects the speedometer so its right on with our GPS.
No change in fuel economy, just better life, lower cost and much higher safety margin...