The Schwalbe Marathon Plus Wheelchair Tyre are designed to combine the comfort and easy running of a pneumatic tyre, and the convenience of Schwalbe's highest level of puncture protection. SmartGuard® technology provides incredibly safe puncture belt for tyres. Unbeatable for more than 15 years. It has proved itself in practice more than any other tyre. Only tyres with SmartGuard® are real flat-less tyres. Available exclusively from Schwalbe. Schwalbe Marathon Plus Wheelchair Tyre Features SmartGuard protection Made from recycled rubber Weight: 470g (22x1.00)