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: 725g . Pressure: 50-70psi. Maximum load: 80kg.