The Pirelli P Zero Race TLR 4S is Pirelli's first all season racing tyre that's got their tubeless technology. It provides excellent grip in all types of conditions and offers increased puncture protection while still giving those race characteristic's that the P Zero Race tyre is famous for.SpeedCore is a new patent-pending technology used in the construction of P Zero Race models with tubeless technology, the choice of the World Tour Factory Teams.  SpeedCore is a cutting edge TLR casing technology with an inner layer of aramid compound plus an aramid breaker providing fast yet very comfortable riding.SmartNET Silica compound is the latest generation blend of smart polymers to provide maximum grip with a low rolling resistance allowing for maximum speed and control. 4 Season handling performance and enhanced grip in wet conditionsHookless compatibility - Sizes 26-622 and below are not compatible with hookless rims - Sizes 28-622 and above are compatible with hookless rims subject to ETRTO 5bar/73psi max pressure limitation. Made in ItalyWeight: 26, 28, 30mm / 330, 365, 395gThis result has been achieved thanks to the SpeedCore tubeless technology, Pirelli's latest evolution in terms of casing constructions, and the SmartNET Silica which holds the best formulation for wet and chemical grip among their compounds. As with the rest of the P Zero Race range, the P Zero Race 4S TLR is made in Italy in Pirelli's dedicated Bollate factory.Pirelli SmartNET Silica technology delivers high rolling efficiency, thanks to its natural anisotropic orientation, which reduces heating while increasing elasticity, to help minimise energy dissipation. Enjoy highly reliable wet grip. The wide surface of the silica rod molecules enhances its natural water affinity, delivering confident handling in wet conditions. Puncture resistance and extensive mileage. Pirelli s SmartNET Silica compound features microscopic rod-shaped particles, that are arranged systematically, rather than chaotically, creating a strong, long-lasting tyre.The highest-performing tubeless-ready road casing in our range, with a unique design that adds an aramid band within the tyre s rubber layer. This new structure adds strength and support to the tyre casing but retains a supple feel for minimal rolling resistance and maximum grip, compared to a tyre with a full bead-to-bead aramid construction. The tyre also features a 120tpi nylon casing for added puncture protection and maximum security.