Can of fix-a-flat = rubber sloppy mess all over the inside of your rim. The tire changer person won't like that and it's hard to come off.
AAA: I think they offer spares but i'm not sure if they charge you(I think they would). Call and ask. If you want it towed you better have "AAA plus"(100mi towing) or you're 3 miles away from home. I'm not sure if it's $3 every additional mile.
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