Challenge StradaJust the right choice to leave gravel roads and bad roads quickly and safely behind. A good tire for gravel races. Range of use: World class tire: rolls fast and provides comfort on pavement, dirt and gravel. Features: Pro Handmade Tubeless Ready with Superpoly casing. Handmade tires combine a variety of outstanding features to provide the highest comfort and lowest rolling resistance. Carefully selected materials are used depending on use performance