The Challenge Gravel Grinder is built to monster the toughest gravel events on the planet. With a fast-rolling but grippy tread and tubeless ready construction, the Gravel Grinder is perfect for all-round gravel use.Fast-rolling semi-slick design with aggressive side tread for excellent cornering tractionSupple 120 TPI casing provides a smooth rideTubeless-ready bead can be used with tubes or tubelessBuilt around a fast-rolling semi-slick centre tread design, the Gravel Grinder rolls well on hard surfaces yet has enough purchase when braking or climbing to retain traction. When leaned over, the large side tread digs into softer ground and gravel to inspire massive confidence. For bikes designed to be used off the beaten path, the Gravel Grinder is the ideal choice.