When performance is crucial, the GravelKing SS R offers the competitive edge on race day, featuring a redesigned casing and construction for optimal performance. Ideal for gravel, dirt, and rough pavement. TuffTex R provides bead-to-bead protection that represents Panaracer’s most supple and lightweight casing to date. This distinctive combination guarantees an exceptionally smooth ride, providing the lowest rolling resistance available in a Gravelking tire. BeadLock is engineered to accommodate a broader range of rims, including both hookless and clincher types. In most instances, mounting the tire can be effortlessly achieved with a standard floor pump. ZSG GRAVEL Compound is crafted from a proprietary ZSG (Zero Slip Grip) material to ensure remarkable resistance to temperature and weather fluctuations. This consistent rubber performance across a spectrum of temperatures provides lower rolling Resistance and improved grip. Folding (Aramid) Bead. Tubeless and Hookless Compatible in widths 700 x 30C and wider. Item Specifications: Flat Protection: Tread and Sidewall, Color: Black/Amber, Weight: 460, Defined Color: Tan, ISO Width (mm): 40, ISO Diameter: 622 / Road / 29", Tire Intended Use: Gravel, Tire Diameter: 700c, Tire Bead: Folding, Labeled Size: 700 x 40, Tire Type: Tubeless Ready Clincher, PSI: 60 / 80,