Panaracer GravelKing SS R Tire - 700 x 40 Tubeless Folding Black/AmberZSG GRAVEL compound Featuring a specialized gravel specific compound crafted from our proprietary ZSG (Zero Slip Grip) material. ZSG ensures remarkable resistance to temperature and weather fluctuations, ensuring consistent rubber performance across a spectrum from near freezing to scorching temperatures. performs lower Rolling Resistance and Grip for both Gravel and Tarmac. TuffTex R TuffTex Rs bead to bead protection represents our most supple and