Challenge Grifo Seta Ulta Tubular Tyre Tire 700x33 Black Cream

Cyclocross World Champion for years. Whether a Pro or just a hard core rider, Grifo is the tire you need. Unbelievable grip with no rolling resistance compromise.
•Silk casing provides the highest ride quality, thanks to an unmeasurably high thread count of tightly woven, fine silk filaments that produce a thin, pliable and extremely strong fabric.
•Corespun cotton casing, a favorite of world-class athletes due to the light and supple material that maximizes comfort, control and performance.
•High thread-count SuperPoly casing increases suppleness and reduces rolling resistance compared to Poly casings.
•UCI legal 33mm width