road side assistance will bring you a tire & change the flat....in fact many will NOT mount your spare and they won't mount a steer tire on a drive line or vise versa.
they don't go "back to town" on anyones nickel - they bring the tire needed with them.
this is so NOT true for RV's.
First of all the chance of getting a road side assistance call responder that has a tow/repair shop that also carries tires is VERY far and few between.
Get into rural areas and none of them carry tires in their shop. And unless you are towing a toad to go into town with and buy a tire to replace while your RV sits stranded on an interstate, you are screwed 6 ways to Sunday if you don't carry a spare.
Road side service will ALWAYS use and mount your spare tire on an RV which BTW does not have steering tires.
4 flats/blowouts in 6 years and EACH and EVERY tow truck roadside service call used my spare.
All camping stores sell bumper mounted brackets for an RV tire.


I use the one with the rack which allows me to also carry expens for the dogs, lawn chairs, whatever, etc.