CO2 cartridges, adhesive, plug tool, and a plug. They work really good. If you're curious how good they work, let the air out of one of your tires and fill it back up with a cartridge (you can buy 5 packs of these). And, they will save you from throwing away a perfectly good tire and rim. Unless of course, money isn't an object to you, but for most people, it is.
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