Easy Question for Seasoned Class A Veterans...

Interesting that most Class A gassers that I have seen have a spare stored underneath at the rear of the coach. I don't know whether diesels carry spares or not, but if you're not seeing them, well, that's an answer. That said, changing a tire on a MH can be a bear of a job, and you may be waiting on the side of the road for assistance -- on board spare or not.