Continental Gator Hardshell Tires are designed with Hardshell-ProTection to provide puncture protection and high mileage. A wider PolyX Breaker and a three ply carcass makes it a these hardshell tires puncture-resistant. FEATURES : High-mileage, carbon-black tread compound Duraskin sidewall protection, in addition to Hardshell features, provides a durable, high-performance tire suited to athletic urban riding styles Hardshell protection consists of casing-ply overlap covering more of the sidewall than normal, plus an extra-wide PolyX breaker SPECS : Color: Black/Duraskin PSI: 120 ISO Width (mm): 25 ISO Diameter: 622 / Road / 29" Flat Protection: Tread and Sidewall Weight (oz): 11.6 Tire Intended Use: Road Tire Type: Clincher Weight: 330 TPI: 330 Tire Bead: Wire Tire Diameter: 700c