Bought a used Dutchstar 2003 in 2016 and had Firestone 275/70R 22.5 put on the unit.. Have put about 35000 mi. on the tires and just had 1 tire loose pressure on rt. side rear inside. Other tires are looking good -- no weather cracks and good tread. Plan to replace the 2 fronts and move the older 2 fronts to replace the 2 rt. rears.
Tom