The Durano Plus offers maximum puncture protection for race bikes while maintaining a racy, dynamic profile. The SmartGuard belt is not as deep as the Marathon Plus but offers a unique level of protection for racing tyres. Features: SmartGuard flat-less is the most effective level of protection, with a belt 5mm thick, flexible India rubber, and partially made from recycled material. TwinSkin sidewalls give an additional rubber coating to protect against cuts. 340g (23c Folding) / 380g (25c Folding)