Harlin

I have an 2005 Itasca 33V on a Workhorse chassis with original 235 80 22.5s and no spare, I am considering changing front wheels to 22.5 x 8.25 Accuride alloys and 255/70r 22.5 BFGs, Generals or Continentals or possibly 275/70R22.5s and run lower air pressure due to larger tires! Has anyone done this, the original alloys which could have been bought on this chassis were 7.50" wide! I am going to keep one of the 235s as a spare any advice?