VITTORIA CORSA N.EXT CLINCHER Race inspired speed & feel, with the everyday durability and affordability of a nylon casing. The nylon casing provides durability for daily racers who want to raise the bar of their performance. New combination of silica and Graphene compound for improved rolling efficiency, grip and longer tread life. Race proven tread design used by Vittoria teams in the World Tour Extensive testing has proven N.EXT to be best in class in terms of puncture resistance, and grip SPEED 9%**   GRIP 32% better**  PUNCTURE RESISTANCE 21%** ** normal tire tread compound ADDITIONAL INFO: https://www.youtube.com/watch?v=Sbc4A9QpekM