The Panaracer GravelKing SK is the benchmark for gravel tires. Featuring tread blocks specifically developed for maximum performance on gravel and gravel surfaces, it offers a perfect balance between traction and rolling resistance. The ZSG Gravel rubber compound and TuffTex casing make the GravelKing SK an incredibly robust yet lightweight tire, ideal for long rides on any terrain. The rubber compound boasts a formulation of materials specific to gravel, starting with Panaracer's patented ZSG (Zero Slip Grip) material. ZSG ensures excellent resistance to temperatures and weather conditions, offering low rolling resistance and consistent grip across a wide temperature range, 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-lasting 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 produced in Japan by expert technicians using the most advanced materials. This ensures exceptional manufacturing quality and performance. Note: For installation, Tubeless Ready tires require rims/wheels compatible with Tubeless technology, 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 performed by qualified personnel.