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My experience with Tubolito tubes is they are no better than butyl when it comes to goat heads. When they were introducing them and promoting their resistance to flats, I emailed them and asked how they did when it comes to goatheads. They kindly sent me some to try, saying they hadn't had a chance to test them.
Unfortunately, fine point of the goat head penetrated them just as it goes right through virtually every puncture resistant tire I've tried.
That's unfortunate since living in the Southwest, it means carrying these kind of tubes as ultralight spares won't work for me, because when a tubeless tire fails, it usually has innumerable goatheads that have sealed spread throughout the carcass that would immeditiately cause a flat.
As I result, I will continue to carry a spare sealant filled tube and hope that a plug is all I need.
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