Choosing an R1T Spare

[R1Thor]

Sure but the max speed on that is 50mph which is a whole different question.

How is it a different question, exactly?
No one's suggesting a full-size spare that they're going to use as a replacement. They're asking if they can have a *mismatched* SPARE.

SO...I'm verily uncertain what you're getting at.

Spare's are also only rated to 50 mph because they're built for temporary use (less material, less structure, less capabilities to handle great pressure changes and road hazards). Either I'm misunderstanding your point, misunderstanding the query I responded to, or your point doesn't make sense.

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[usulio]

How is it a different question, exactly?
No one's suggesting a full-size spare that they're going to use as a replacement. They're asking if they can have a *mismatched* SPARE.

SO...I'm verily uncertain what you're getting at.

Spare's are also only rated to 50 mph because they're built for temporary use (less material, less structure, less capabilities to handle great pressure changes and road hazards). Either I'm misunderstanding your point, misunderstanding the query I responded to, or your point doesn't make sense.

I'm responding to these parts of the original post.

just need a spare that functions well in a jam without speed & distance restrictions.
...
Question #1: If I got a spare right in between at 33.5 inches, will that be ok with either setup? That's about a 1.8% difference from either.
Question #2: When you start looking at availability for that diameter (the biggest challenge), the only thing I can find is a 20x8.5 wheel (MSW Type 52 for example has 48 offset) with a 285/60R20 tire (Goodyear Wrangler Workhorse HT for example). That combo is on Tirerack and seems to have the load rating needed. I know that's a bit wider, but hopefully wouldn't be a problem. Is this a good idea?

So the question seems to be if you can put a full-size 33.5" tire on one wheel and drive without speed or distance restrictions while the other 3 are 34" or 33" OEMs.

 

[SteveDoverNH]

I've just picked up a (new to me) 2024 R1T, and I'm anticipating keeping the 21" wheels/tires for long road trips and getting a 20" all terrain setup that I can swap when needed. So I'd like to buy one spare tire to put under the truck bed that I can just keep there regardless of which setup I'm using.
I don't care about cosmetics, just need a spare that functions well in a jam without speed & distance restrictions. My understanding is that the main requirement is tire diameter - you don't want to stray much from the diameter of the other wheels on the truck.
- OEM 21 inch: 275/55R21 with 48 offset = 32.9 inches
- OEM 20 inch: 275/65R20 with 48 offset = 34.1 inches
Question #1: If I got a spare right in between at 33.5 inches, will that be ok with either setup? That's about a 1.8% difference from either.
Question #2: When you start looking at availability for that diameter (the biggest challenge), the only thing I can find is a 20x8.5 wheel (MSW Type 52 for example has 48 offset) with a 285/60R20 tire (Goodyear Wrangler Workhorse HT for example). That combo is on Tirerack and seems to have the load rating needed. I know that's a bit wider, but hopefully wouldn't be a problem. Is this a good idea?

I am selling a 20" spare setup, including the service kit (jack, wrench, hold-down, chocks, etc). Sport Dark wheel with Scorpion. See my ad in the classifieds. I may be on a trip through North Carolina in a couple of weeks if that is helpful.

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