RVThere......I would also agree that you have a SLIGHT alignment issue, which isn't bad after 46K. You also have an underinflated issue on that same tire compared to the other. Have you ever four corner weighed your coach. I have a 36' coach and run 105 psi in the fronts. On a 40', you should be at least 105'. You may be a little heavy on that side.
22.5 tires are now outrageously priced. You're at the 6 year mark on your tires. I would replace the front two and keep the good one for a spare. Make sure everything is correct on the coach and then do a two axle alignment. It should be about $150.00. Once done, you'll know your coach is going down the road straight. By doing the two fronts now, it won't be such a shock when you replace the four rears in a year or two. I wouldn't move tires from the rear after 46k, you're asking for issues.
Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab