Protect how?
If you mean the radiused things that a tire sits in to preserve its roundness, yes I've used them. And I think they have a sort of value.
However
I have a car sitting 10 year old bias ply tires, and one sitting on 12 year old radials and they are all perfectly round.
The bias have about 1,000 miles in 10 years, the radials about 100 miles.
And
I havent read on this forum of tires going out of round
If you meant tire covers...thats a different thing.
(I had to guess because you didn't afford a link)
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