During the R&D process, Pirelli has succeeded in developing an innovative carcass material. Considering the significant performance improvement of this compound, Pirelli has decided to launch a new and improved P Zero Race TLR. A new carcass solution has been used to work on one of the most important parameters in bicycle tyres: rolling resistance. The new SpeedCore carcass is a thin, airtight layer of rubber compound with aramid particles, which forms the first layer when viewed from the inside. The high flexibility of the rubber compound makes the tyre faster and more supple, while the aramid layer ensures better puncture resistance. The carcass is completed by a 120tpi nylon fabric and a puncture-proof aramid breaker. The tread pattern, for which Pirelli's most advanced compound SmartEvo is used, guarantees maximum performance.