Pirelli 275 45 R21 107Y P Zero PZ4 MOS PNCS 2025

The Pirelli P Zero PZ4 in 275/45R21 107Y MO-S PNCS is a premium summer performance tyre designed for high-end cars and SUVs that need a strong balance between high-speed control, wet-road grip and refined cabin comfort. This exact version carries Mercedes-Benz MO-S homologation and Pirelli Noise Cancelling System technology, making it a more specialised specification than a standard P Zero PZ4 in the same size. The 275 mm footprint and 45-series sidewall give the tyre a substantial road contact area while retaining enough sidewall to make everyday driving more composed than an ultra-low-profile performance fitment. The 107Y service description corresponds to a maximum load of 975 kg per tyre and a Y speed category of up to 300 km/h when operated within the manufacturer's conditions. 0

About Pirelli P Zero PZ4 275/45R21 107Y MO-S PNCS

The Pirelli Tyres P Zero PZ4 is an ultra-high-performance summer tyre developed through Pirelli's experience in motorsport and collaboration with vehicle manufacturers. This particular 275/45R21 version is marked MO-S, indicating Mercedes-Benz homologation, and includes PNCS, Pirelli's internal noise-cancelling technology. The tread uses an asymmetric layout with differentiated inner and outer areas, wide circumferential grooves for water evacuation, solid tread elements for stability and carefully tuned pitch and siping arrangements. Pirelli describes the compound and tread design as being developed to balance dry handling, wet performance, comfort, rolling resistance and mileage. 1

Steering Response and High-Speed Stability

The 275 mm tread width gives this P Zero a broad contact patch, while the 45-profile sidewall provides a useful compromise between steering precision and everyday road compliance. The tread's outer section is designed to support lateral stability and cornering, while the internal construction is tuned around the requirements of the vehicle for which the tyre was homologated. On a large premium SUV, this can produce a planted steering response without the excessively sharp impact response associated with a much lower-profile tyre. The Y rating also reflects the tyre's high-speed performance orientation, although the speed rating should never be treated as a recommended cruising speed.

Dry Grip, Wet Braking and Water Evacuation

The P Zero PZ4 is intended for drivers who want performance in both dry and wet conditions rather than a tyre optimised purely for mileage. Its asymmetric tread separates the working characteristics of the inner and outer portions, while broad circumferential grooves help move water away from the footprint and reduce the risk of aquaplaning. The exact MO-S PNCS version is listed by Pirelli with an A wet-grip classification in its European specification, providing a useful indication of its wet-road braking capability. It remains a summer tyre, however, and Pirelli does not classify this version for severe snow or ice conditions. 2

PNCS Comfort and Road Noise

One of the defining features of this particular specification is PNCS. Pirelli Noise Cancelling System uses a sound-absorbing device attached to the inside circumferential wall of the tyre to reduce the transmission of tyre-generated noise into the cabin. Pirelli states that the technology can reduce interior tyre noise significantly, with its product information describing reductions of up to half compared with tyres without PNCS. The exact 275/45R21 MO-S PNCS specification is listed with 70 dB external rolling noise and a B external-noise class on Pirelli's European product information. 3

Who Should Choose This Configuration?

This specification is particularly relevant to owners whose vehicle calls for a 275/45R21 107Y Mercedes-homologated tyre and who want the additional refinement provided by PNCS. It is not simply a generic replacement where any 275/45R21 tyre is automatically equivalent; the MO-S marking means vehicle-specific homologation should be respected when the manufacturer specifies it. The published dimensions give an 8.5 to 10.5-inch approved rim-width range, a 9-inch measuring rim and an overall diameter of approximately 30.7 inches. The tyre is listed as SL rather than XL, with a maximum load of 2,149 lb or approximately 975 kg per tyre. 4

The trade-off is that a summer ultra-high-performance tyre is not intended to deliver the winter versatility or soft, comfort-first character of a touring or all-season design. It is better suited to premium SUV and performance-car owners who value steering accuracy, wet braking, high-speed stability and controlled road manners. The Pirelli P Zero PZ4 also has no published treadwear mileage warranty for this exact configuration, so actual service life will depend heavily on vehicle weight, alignment, inflation, driving style, road temperature and rotation practices. For customers using Dwbtyres to buy car tyres in UAE, this 2025 specification is especially relevant when the vehicle requires the Mercedes MO-S homologation and PNCS technology. 5

Technical Specifications