The Panaracer Gravelking EXT was developed for the most extreme conditions. With a tread pattern specifically designed for mud and slop conditions, the EXT offers excellent grip even in the most difficult situations. The rubber compound boasts a specific gravel material formulation, starting with Panaracer's patented ZSG (Zero Slip Grip) material. ZSG guarantees remarkable resistance to temperature and weather conditions and offers low rolling resistance and consistent grip across a wide range of temperatures, from near-freezing to scorching heat. TuffTex is a revolutionary structure developed exclusively for GravelKing tires. Thanks to its soft casing and high thread count, TuffTex ensures long-term durability and provides precise puncture protection. This unique compound guarantees an exceptionally smooth ride and offers the lowest possible rolling resistance on a GravelKing tire. BeadLock: The tire bead fits various rims (including hookless ones) and in most cases can be mounted with a standard floor pump. Panaracer Gravelking tires are manufactured in Japan by experienced technicians using the most advanced materials. This guarantees exceptional production quality and performance. Note: For installation, Tubeless Ready tires require tubeless-compatible rims/wheels, tubeless valves, tubeless rim tape, and sealant. Puncture sealant is not necessary for UST Tubeless tires, but is recommended due to increased puncture protection. Installation of tubeless tires is not always easy and should only be carried out by qualified personnel.