Originally Posted by Steve Ownby
I have 315/80 Michelin XZA2 Energy tires mounted on 8.25" wheels on my steer axle. They have served me well there for 7 years now. No sidewall cracks and no strange wear patterns. I will be replacing these due to age within the next year. In my research during the last couple of months, I have discovered that both Bridgestone and Continental will allow 315s on 8.25" wheels with no down rating of carry capacity. FMCA is working toward a national pricing program with Continental similar to the Michelin program.
Actually there IS a weight reduction on 8.25 wheels. I have both charts , Michelin and Continental , their ratings are the same , 315/80R22.5 L ply. Only Continental states on the chart , 9" / 8.2 " ether one will work. And that's at 130 psi. However in small print they both state a reduction to 120psi which does lower the capacity . I am going with Continental's , discount or not I guess.