Specialized Turbo Cotton Hell of the North TiresDesigned for the cobbles of Ronde Van Vlaanderen and Paris Roubaix and ready for your hometown roads, the Specialized Turbo Cotton Hell of the North Tires feature the same tread design as the S Works Turbo Hell of the North Tubular version making it one of the world's fastest tires. The overall design supports you with more traction and comfort, and in the end, will give you more speed compared to other tires. The supple 320 TPI, cotton casing