2021 tab 400 spare tire question

I just replaced all three tires on my 2021 T@B 400 with Goodyear Endurance ST 225/75R15. No issues.

My spare is a 235/75R15.  It fits well (without much extra space) under the tongue of my 2020 T@B 400.

@Docbadger1 Did you use the existing wheel or did you need to change that to match the others? 

I plan to move a tire from the axle to the spare when I get the next set of tires. I change my tires before they're worn out or age out so that tire will still have tread. If you put a new tire on your spare and don't need it you'll be throwing away that tire in 6 or 7 years when it ages out. In the early days, pre-T@B, I lost tires due to age. Then I learned that tires have a life span regardless of wear. BTW, since I live in my T@B and travel a lot I wear tires out before they age out.