Motorhome Tires Size Change in Tires Posted September 9, 2019 · Report reply I'm looking at all my options for new tires on my 2009 Winnebago Journey 37H I've purchased this last year with 2013 255/80-22.5 Michelin XRV tires on it now. I drove these tire not know to check age when purchased from NC to Vegas this last January. I'm looking at the (3) types of tires sold thru FMCA , Michelin, Hankook and Continental. However both Hankook and Continental only come close to the size I have now in 275/80-22.5. My question is will that size work on my coach?