Bontrager Self-Sealing Thorn-Resistant Presta Valve Bicycle Tube

Bontrager's Self-Sealing Thorn-Resistant tubes are the ultimate defense against flats. With a beefy 4.1mm thickness along the tread and sidewalls, these tubes scoff at the foreign materials on a mission ruin your day. And, if somehow a rogue thorn or piece of glass manages to penetrate your defenses, these tubes pack a sealant inside that instantly seals small hole punctures.