ASs I was cleaning motor home for a trip I noticed the tires have weather cracks. This 255/80R 22.5 tires. I got a quote of $6,700.00 installed. That ruined my plans for a long trip this year.
My coach spec'd the same size tire. Not many options, so we used a 295/75, just a touch taller with no fitment issues. Went with Dunlop SP384, Made in USA, Truck Tires. $2700.00 out the door, with bead balancing included.