We're not afraid to say that our GRIPTON® compound is the best out there. And when combined with an ultra-supple 320 TPI cotton casing, you get a tire that's very special—you get the Specialized Turbo Cotton clincher road cycling tires. Both materials stand for master craftsmanship, and they work in harmony to reflect Specialized's dedication to building the world's fastest tires. By bringing both of these materials together, Specialized has created the best clincher tire out there. It provides a clear-cut performance advantage.