Built as its ultimate race tires, the One Clincher Tires deliver the best performance Schwalbe has to offer. With a production facility exclusively churning out tires using the OneStar rubber compound that makes these tires so fantastic, these clinchers are feathery light without the drawbacks commonly associated with lightweight, grippy race tires.Schwalbe's new compound, OneStar, made these tires faster, lighter, and more durable than anything it's produced before. It also helped them achieve an extremely low rolling resistance for the One Tires. They cut no corners with these tires, dedicating an entire factory with fixed vulcanization and production units used exclusively for the One.The OneStar triple compound was designed to have incredibly low rolling resistance without sacrificing grip in wet and dry weather like other high efficiency tires. Schwalbe improved cut resistance while achieving weights as low as 205g per size.