Pirelli Cinturato Gravel S Tire - 700 x 40 Tubeless Folding Black. Cinturato Gravel S is the gravel tire for soft and muddy terrain its a versatile model that delivers a safe cycling experience in adverse weather conditions and on technical tracks at the very limit with mountain biking. Cinturato Gravel S in the suggested model for those looking for a reliable tire which is easy to control and safe in every condition. Grip and safety are prioritized rather than the pure speed of racing-specific models.