My existing Michelin 255/80x22.5 tires are 8 years old and I am replacing them. The Michelins I have on now I have been pleased with. When I bought them 8 years ago they were 2400 dollars out the door...
Try B F Goodrich ST230's. Load range H. We bought them and have since replaced them with Michelins but we were happy with the Goodrich. They are owned by Michelin and made in the USA. They were recommended by a tire shop in TX who is familiar with Prevost coaches. They are a bit stiffer than the Michelins is all. We replaced them at 6.5 years but the tire guy said we could probably get another year out of them as they were wearing fine.