The new Flat-less tyre. After 10 years, Schwalbe have thoroughly overhauled the Marathon Plus. The only true flat-less tyre gets a new, dynamic profile and boasts many internal improvements:   Rolling Resistance. The patented, 5mm thick SmartGuard layer, when compared to all generic products, has a significant advantage in rolling resistance. Schwalbe further extended its lead in the latest version.   Specification: Type: Wired. Compound: Endurance. Execution: SmartGuard. Skin: Twin. Weight: 480g . Pressure: 65 - 110psi. Maximum load: 65kg. ERTO 349.