Pirelli Cinturato Gravel H Tire - 700 x 40 Tubeless Folding BlackPirelli Cinturato Gravel H Tire 700 x 40 Tubeless Folding Black. The Cinturato Gravel H (Hard Terrain) is a gravel specific tire designed for compact terrain and the hardest surfaces. The tread features low tightly packed knobs and elevated ability to adapt to the terrain offering a large contact area and therefore excellent feel while riding. SpeedGRIP Compound adds features of mechanical resistance and chemical grip without compromising the rolling