Continental Gatorskin Tires feature puncture resistant casing and wear optimized tread. FEATURES: Highly puncture-resistant casing with Duraskin sidewall protection High mileage carbon-black tread compound Continental has changed the name of the Ultra Gatorskin to Gatorskin. No changes have been made to the tires other than the label SPECS: PSI: 102 ISO Diameter: 622 / Road / 29" Flat Protection: Tread and Sidewall Tire Intended Use: Road Tire Type: Clincher TPI: 180 Tire Bead: Folding Tire Diameter: 700c