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I've never had a tire failure that an air compressor could fix. That's only useful against the very slowest of leaks, which TPMS is already an excellent defense against since it warns you quite early.If you carry an air compressor (you should) it will cover all but the very worst tire damage.
I suggest a spare is a waste of money. If you carry an air compressor (you should) it will cover all but the very worst tire damage. You can augment this with something like tow services through your insurance carrier or AAA.
Michelin offers a few tires with this stuff, which it calls SelfSeal. But there are not that many tires with that feature. GM chose to use a Michelin Energy Saver AS with SelfSeal tire as original equipment on the Chevrolet Bolt.There's a new option for those who fear a flat tire. Some new tires, I think, of Pirelli fame, have permanent sealant inside that prevents air flowing out through a hole from a nail in the tire.
Flat tire due to nail can be fixed with a flat tire repait kit. Only flat tire with side wall damage is serious if you are in a no where place. Tire with permanent sealant inside will not heal itself in this case.There's a new option for those who fear a flat tire. Some new tires, I think, of Pirelli fame, have permanent sealant inside that prevents air flowing out through a hole from a nail in the tire.