Pirelli 245/40 R20 99Y RunFlat P Zero PZ4 * 2024

Pirelli P Zero PZ4 245/40 R20 99Y XL RunFlat * 2024 is an ultra-high-performance summer tyre designed for compatible premium cars and SUVs requiring a 245 mm section width, 40-series profile and 20-inch rim. Its 99Y XL specification provides a maximum load index of 99 and a Y speed rating up to 300 km/h, while the RunFlat construction is designed to help maintain vehicle control after loss of tyre pressure. :contentReference[oaicite:0]{index=0}

Tread Design and Steering Response

The P Zero PZ4 uses a performance-focused tread design developed to provide precise steering response and controlled road contact. Its customised tread geometry and compound are engineered around the requirements of high-performance vehicles, supporting accurate handling during both everyday driving and more demanding cornering. :contentReference[oaicite:1]{index=1}

Dry-Road Handling and Cornering

The P Zero PZ4 is designed for strong dry-road performance, with a tread and compound combination focused on grip, braking and high-speed handling. The 245/40 R20 dimensions and XL construction provide a performance-oriented setup suited to vehicles where steering precision and cornering stability are important.

Wet-Road Performance

Pirelli's PZ4 tread compound uses a high-silica formulation intended to support wet traction, while the tread design is engineered to provide effective water management and predictable wet handling. The tyre is rated A for wet grip in the verified 245/40 R20 99Y XL * specification. :contentReference[oaicite:2]{index=2}

High-Speed Stability and Comfort

The 99Y service description allows speeds up to 300 km/h under the applicable operating conditions. The PZ4 also incorporates tread design features intended to reduce external noise and rolling resistance, with the verified specification carrying an external rolling-noise rating of A and 69 dB. :contentReference[oaicite:3]{index=3}

RunFlat Technology

The RunFlat construction is designed to temporarily support the vehicle after a loss of air pressure, helping the driver maintain control and continue to a suitable stopping or service location. Pirelli states that its RunFlat technology can allow continued travel for up to 80 km at speeds of up to 80 km/h after a puncture, subject to the applicable conditions. :contentReference[oaicite:4]{index=4}

Summer Performance

The P Zero PZ4 is an ultra-high-performance summer tyre developed for premium cars and SUVs. Its design combines dry and wet performance, high-speed stability, braking capability and steering response, making it suitable for drivers seeking a performance-oriented road tyre. :contentReference[oaicite:5]{index=5}

Load Capacity and Speed Rating

The 99 load index corresponds to a maximum load capacity of 775 kg per tyre, while the Y speed rating corresponds to a maximum rated speed of 300 km/h. The XL designation identifies the reinforced load version. Actual permissible load and pressure must always follow the vehicle manufacturer's specifications. :contentReference[oaicite:6]{index=6}

Who Should Consider This Tyre?

Pirelli P Zero PZ4 245/40 R20 99Y XL RunFlat * is suited to compatible premium cars and SUVs requiring this exact size and specification. It is particularly appropriate for drivers prioritising precise handling, strong dry and wet grip, high-speed stability and the additional mobility benefits of RunFlat technology.