With an emphasis on durability, comfort, and safety, the Challenger's construction was meticulously thought out, combining a slightly thicker tread with comfort technology that uses high density woven fibres for unrivalled puncture protection and unmatched durability, tested up to 5,000 miles (8,000 km).Key Features:The Tubeless Ready version of the Challenger.The tyre of the iconic Transcontinental Race.The toughest road tyre on the market thanks to its double tread reinforcement.Preventive fluid only protects the tyre in the event of damage.A dual compound for good grip and a 10,000km lifespan.ETRTO Size: 25-622Tubeless Ready (TR), fits tubeless rims with no inner tube and also standard rims with inner tube.Bead: FoldingHardShield (HSH), textile grid reinforcement.Bi-compound.Weight: 385g