Hello, I have a decision to make. The integral steering box in my MC5 cuts into the spare tire compartment. Now I have to seriously consider putting that great big dirty, smelly round block of rubber in one of my precious storage bays. I really don't want to!
Can you consider one of the rear tires as a spare? It sounds like a bad idea, I know. but In my mind it is a perfect plan.
Will it fit with the air let out of it? Or if it's just the tire (no rim)? If so, this might be the solution -- but STORE the tire in your garage, only putting it in when you are hitting the road, so that it doesn't "take a set."
If you don't have the tools to change out the wheel, you're calling for road service anyway. The service call will cost a couple of hundred bux even if you have a spare. Since we have common tires on our coaches, it's no problem getting replacement tires, you just need to be able to pay the bill.
Drive and steer tires have different tread patterns, so they really aren't interchangeable except as a get-home tire (a spare might have any tread). Commercial truck owners who lose a steer tire will often call around for a discount on replacing BOTH steers, just so they will both be matching. This means a bigger total bill, but takes some of the bite out of it.
Losing a drive, though, is another story. Any tire the right size will work to get you home. Truck tire shops will nearly always have some good used tires, pulled from a truck getting a new set. So, if you are going to pick a tire for a spare, pick a steer tire.
Now, WE are different from trucks in that we spend a lot of time away from the highway, where there are more road hazards such as broken concrete, potholes, nails, junk fallen out of trucks going to the dump, etc. Take that into account before you head out with no spare and no tools. You may go your whole life without losing a coach tire, or you might go three miles up Bloody Basin Road.
Oh, yeah, and anytime you pass by a truck or a coach with a flat, listen for the sound of your own tires picking up some of whatever was big enough to get them. At the next rest area, pull in and do a tire check (this is when Cat's Eyes will pay themselves off for you!). This has saved a lot of truck drivers a lot of grief.