The Tannus Armour insert slips inside an existing tubed tire to help prevent flats.
The Armour insert was created by Tannus to offer standard tubed mountain bike tires some of the same flat prevention as tubeless tires. The curved insert fits around the tire’s inner tube to completely enclose it, wrapping it in a foam layer that tapers from 15mm thick at the treads to 2mm on the edges of the insert. By surrounding the tube in this way, the Armour insert helps protect against pinch flats and sidewall punctures, and even allows the biker to ride home on a flat, if necessary.
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