Only 1 breakdown in over 11 years with a Class "A". On a return trip from New Jersey, we were warned by a passing pickup that the left front driver tire was going soft.
Stopped on the side of I-87 in northern NY and checked the situation.
Still had reasonable air left in the tire, and the next rest area was in view, so limped into the rest area. We do have roadside assistance, but decided to see if I could do it myself and possibly save some time.
Dropped a couple of 2x6 planks under both front jack's, and raised it up partially, broke all the lug nuts loose, then lifted the front wheels off the ground, removed and replaced the wheel/tire combination with the spare. It was a 19.5" unit, not certain if I could handle the larger 22.5" tire/wheel combo's today, and most units don't come the the spare anyway.
That's it, in the 11 year's of Class 'A' ownership, not bad, knock on wood....