One of Serfas&'; most popular & best-selling tires. Utilizing a smart inverted tread pattern, the Serfas Drifter is designed to be an ace both on pavement and off-road. With Serfas Drifters you will be sure to feel the freedom and have confidence to ride whatever environment you may find yourself in. - Multi-Sport Flat Protection System - 68 durometer center ridge for long life & 58 durometer sides for enhanced cornering capability - Bead: Wire - Pressure: 65psi