700x33 CHALLENGE GRIFO PRO OT BLK/TAN
• 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