[hunts800]

Had recent experience which directly applies. Had fairly new G614's, but had kept the Marathon spare. Picked up a large scissor blade which destroyed one of the G614's (went flat, no damage to trailer). Called Good Sam, dropped spare, only to find it is an 80R, not an 85R like the G614's. Good Sam guy would not install as it is a smaller tire, and they would not let me go on the road with one smaller tire for safety (liability) reasons. Upshot, had to purchase not only a new G614, but a new spare the same size as the G614's while on the road in Oregon. Would have been easier and cheaper to have put five G614's on at the time! Plus, finding G614's in a non-metropolitan area is difficult at best.