The SS was the pioneering choice and remains the optimal selection for a smooth center tread gravel tire, delivering exceptional cornering grip. Tubeless Ready up to 60 PSI on most models* Product Specifications: - Ideal for gravel, dirt, and rough pavement - Available in Black Tread and Black or Brown Wall Colors - Folding (Aramid) Bead? Available in 700C and 650B/27.5" and a variety of widths - TLR and Hookless Compatible in widths 700 x 30C and wider and all 650B/27.5" versions. TuffTex Boasting a supple, high thread count casing and fortified with Panaracer's own precisely engineered bead-to-bead puncture protection. Beadlock Our meticulously redesigned bead has been engineered to accommodate an extensive array of rim types and encompassing both hookless and clincher varieties. ZSG Gravel Crafted specifically for gravel terrain and guaranteeing exceptional resilience against temperature variations, delivering consistent rubber performance from cold to hot.