Pirelli 265 35 R20 99Y P Zero PZ4 MO1 2025

Pirelli Tyres developed the P Zero PZ4 through its performance-tyre programme and close collaboration with vehicle manufacturers. This particular version carries the Mercedes-Benz MO1 original-equipment marking, meaning its construction and performance characteristics are specifically homologated for Mercedes applications. Pirelli lists the exact 265/35 R20 99Y XL MO1 with an A wet-grip rating, D fuel-efficiency rating and 69 dB external rolling noise. 0

Sharp Steering and Cornering Response

The low-profile 265/35 construction gives the P Zero PZ4 a distinctly responsive steering character. There is less sidewall flex between the wheel and tread, so steering inputs can translate into quicker directional changes. The wide contact patch also helps the tyre remain composed when cornering at higher speeds. For a performance-oriented Mercedes, this makes the tyre better suited to drivers who prefer a direct and controlled steering feel rather than the softer response of a comfort-focused touring tyre.

Wet-Road Braking and Grip

The MO1 specification carries an A rating for wet grip, placing particular emphasis on maintaining road contact when the surface is wet. Pirelli describes the P Zero PZ4 as a tyre designed for high-performance dry and wet driving, with its inner tread design using a high-silica approach to support wet-road safety, traction and braking. 1

Dry Performance and High-Speed Stability

On dry asphalt, the P Zero PZ4 is intended to deliver the controlled response expected from an ultra-high-performance tyre. The stiff low-profile structure helps resist excessive deformation during hard cornering, while the broad 265 mm footprint supports consistent traction. Its 99Y XL designation provides a load capacity of up to 775 kg per tyre and a Y speed rating for speeds up to 300 km/h, when permitted by the vehicle manufacturer. Pirelli lists this exact version as XL. 2

Road Comfort and Noise

Despite its performance-oriented construction, the PZ4 is designed for road use rather than being a dedicated track tyre. Pirelli's tread development uses pitch sequencing and siping intended to manage noise and rolling resistance. The exact MO1 version has a declared external rolling-noise level of 69 dB, which is relatively controlled for a 20-inch, 35-series performance tyre. 3

Mercedes MO1 Original-Equipment Specification

The MO1 marking is an important part of this particular product. It identifies a Mercedes-Benz homologated version rather than simply a generic P Zero PZ4 in the same size. Pirelli lists the exact 265/35 R20 99Y XL MO1 in its Mercedes catalogue, so buyers replacing an original set should pay attention to the OE marking and not assume that every 265/35 R20 99Y PZ4 has identical specifications. 4

Technical Specifications