How does it feel to be an hours ride from the nearest town and not have to worry about getting a puncture? Amazing.Our revolutionary airless tyres are 100% puncture-proof. Made from a closed-cell-polymer-foam material they have no inner tube (that\'s right, no inner tube). They are super light-weight, low rolling-resistance, comfortable and have amazing grip in all riding conditions. A game-changer? 100%.Designed for both hybrid and mountain bike use, Razor Blade has the perfect balance of handling and comfort. With the equivalent tyre pressure of 80 psi, it provides enhanced contact with the road, whilst maintaining excellent cushioning for those country/city rides.Key Features:Compound: Aither 1.1+,Hardness: R,PSI: 80,Weight (g): 800,Etro: (44-559),.Specifications:Speed: 4/4,Durability: 5/5,Grip: 5/5..