Pirelli 255 35 R20 97Y P Zero MO 2025

Pirelli Tyres developed the P Zero as a road-focused performance tyre for premium vehicles. This exact specification carries the Mercedes-Benz MO original-equipment marking, identifying it as a Mercedes-homologated version. Pirelli lists the 255/35 R20 (97Y) XL MO with a D fuel-efficiency rating, B wet-grip rating and 73 dB external rolling noise. 0

Responsive Steering and Cornering

The low 35-series profile gives this P Zero a direct steering character. Compared with a taller-profile touring tyre, there is less sidewall movement between the wheel and tread, allowing steering inputs to feel quicker and more controlled. The wide 255 mm footprint also helps maintain a stable contact patch when the vehicle is cornering or changing direction at motorway speeds.

Wet-Road Performance

Pirelli's tread design uses three broad longitudinal grooves to channel water away from the contact area, helping reduce the amount of water trapped beneath the tyre. The manufacturer also describes the P Zero's tread as being developed for wet handling, braking and aquaplaning resistance. The exact MO specification carries a B wet-grip rating. 1

Dry Grip and High-Speed Stability

On dry roads, the P Zero is designed to give the driver a firm and predictable response. Its relatively stiff tread structure supports braking and traction at higher speeds, while the S-shaped tread design helps distribute pressure across the contact patch. With a 97Y service description, each tyre is rated for a maximum load of 730 kg and a Y speed rating up to 300 km/h, subject to the vehicle manufacturer's requirements.

Everyday Comfort and Road Noise

The 35-series construction naturally transmits more of the road surface than a taller-profile tyre, particularly over potholes, sharp joints and heavily patched asphalt. Nevertheless, this is still a road tyre rather than a track-only product. The 73 dB external noise rating reflects a design that balances performance with normal road use. Drivers prioritising steering response and high-speed stability will generally find this profile more suitable than drivers seeking maximum impact absorption.

Mercedes-Benz MO Homologation

The MO marking is important when replacing original equipment. Pirelli specifically lists the 255/35 R20 97Y XL version with Mercedes-Benz MO homologation, so it should not automatically be treated as identical to every other 255/35 R20 97Y P Zero. Matching the approved OE specification is particularly important when the vehicle manufacturer specifies a homologated tyre. 2

Technical Specifications