We attended a Monaco Int'l. Pre Rally at Lancaster, Ca. in March, 2006. I met a Michelin Tire Design Engineer who was working at the Michelin both, and who eventually went to Pomona, Ca. to work at the FMCA Rally. I had ordered a new 07 Executive and was interested in his input about the 315-80R-22.5 Tire . He informed me that that product was developed to address the many failures , warranty claims from Trash Haulers, garbage trucks. Back then they did not use any on board weighing devises such as Scale-O-Matic which i had had on our Co. trucks. The tire was designed for 9" rims, and subsequently to satisfy a larger market, they developed an inflation/ weight capacity chart for 8.25" rims.
After taking delivery of our Executive in 6-06, i had the 295-80-22.5 Badyears removed and had 315-80R-22.5 Michelins installed on the 8.25" OEM Rims, and Sold the 8 Badyear tires to a friend who had a Trucking business. Ran those tires from 5-07 to Spring of 2014 , full timing. Never an issue. I used Nitrogen, by MY choice.
Attached is a picture of my Aladdin screen , using a particular trip, that i kept just for accumulative mileage. This JUST indicates Cruising Miles. I had 79K miles on the coach/ tires when i Sold it.