Panaracer GravelKing SS Tire - 700 x 28 Clincher Folding BlackZSG 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 boasting a supple, high thread count casing fortified with precisely