I’ve only done it once on my old car and it was extremely convenient. I haven’t done it on my offroad vehicle yet. I always seem to find/buy tires through some sort of deal instead of going through my usual tire shop. I just take the tires there for mounting. I got lucky once and got a set of 4 brand new Pro-Comps for $270. Saved 66% off sales price. Last set I got for a way better deal on amazon than any tire shop I called, so I wasn’t able to get any sort of warranty. I’ve always been pretty lucky with not slashing many tires either (unlike
@4runner DOA). 2 tires total and that’s pretty impressive I’d say with the amount of stupid shit I do. Last one was an old worn out tire so I wasn’t too mad.
But I guess back to the topic of your question. If you get a good enough deal on tires through a shop, then definitely get a warranty. If you do what I’ve done and find better deals through a third party, then obviously you can’t.