No spare tire holder on our 2011 Coachmen Mirada 29ds. What?

We keep a mounted 22.5" tire in a compartment. Half the tire sits on a pass-thru shelf and the front half is supported by a 3/4 inch piece of rebar, about 4 foot long....with the ends sitting on the compartment frame. A 2x4 wood brace secures the rebar. Did this 4-5 years ago and it has held up fine.

We have road service to do the tire change. Others have used a heavy duty tire carrier that goes into your hitch.

(The shelf is not tall enough to hold the entire mounted spare).