- Maximum puncture protection for race bikes! Durano Plus with a racy, dynamic profile. The SmartGuard(R) belt is not as deep as the Marathon Plus but offers a unique level of protection for racing tyres. The most puncture resistant road bike tyre available on the market. **Features:** * PROTECTION: SmartGuard(R) Flat-Less - the most effective level of protection, a belt of 5mm thick, flexible India rubber, partial made from recycled material. Protects even against thumb-tacks * SIDEWALLS: TwinSkin which is an additional rubber coating to protect against cuts * COMPOUND / TPI: Dual compound with two different rubbers for optimal performance / 67 TPI "¢ WEIGHT: 410g (23c Rigid) 450g (25c Rigid) 530g (28c Rigid)