Thanks, for steering me on the right track, re pressure symmetry side-to-side. That's a good gotcha, one is tempted to look at the axle-end weight notation in the inflation charts and concur that they could be independent. But, Michelin specifically says to never get that precise HERE
I'll assume they want us to use the higher
of the two axle-end weights, when going into the inflation table.
El Cajonee mentioned using the sticker by the driver's seat. Offthewall answers this issue best, in an earlier post:
The door sticker pressures are for your MAXIMUM GVWR, not "unloaded" weights. The reason to get a weigh is that you most likely are not traveling at your max GVWR and you should put less pressure in the tires than the door sticker states. Without a coach weigh, the door sticker pressures are your best starting point, knowing that you are likely not at the GVWR and likely have a little too much air in the tires. There is no danger of a blowout from having the pressures set at the higher than needed door sticker values. What will be affected is handling and ride. Too much air for your actual weight will result in a non optimal contact patch and a rougher ride.
He didn't mention that chances are, the tires on your coach aren't even the same tires used to come up with the stickers' numbers.
Indeed, the only correct way to find inflation values is to get an axle-end weight and then use the manufacturer's data for the tires on the coach at present.
Hey, I fell for that one, too; until some nice person here put a bug in my ear. Thanks, iRV2!!