The Thor Motorhomes have a big tire and the only hitch mounted spare tire carrier we have for it is the Roadmaster Hitch Mounted Spare Tire Carrier w/ 2" Receiver Opening item # RM-195225. This carrier holds 16" to 24-1/2" spares with any bolt hole pattern and fits a 2" hitch.
I have linked a review video below so you can see all the functions of this tire carrier.
The etrailer Hitch Mounted Spare Tire Carrier item # e98ZR you were looking at and other comparable spare tire carriers... view full answer...