JARGON BUSTERS

Quick Guide: Markings & Features

• XL / MFS: Reinforced for high-performance weight (XL) and MFS is Pirelli's term for a rubber lip to protect alloy wheels.
• RUN FLAT: A reinforced sidewall allows you to drive for a limited distance after a puncture (usually 80km at 80km/h).
• ELECT: Specifically engineered for high-performance electric vehicles to handle instant torque and reduce road noise.
• OE Marks: Custom-tuned for AO (Audi), MO (Mercedes), ★ (BMW), N0 (Porsche), and T0 (Tesla).
• F1 Technology: Derived from Pirelli's Formula 1 expertise to ensure maximum cornering stability and steering precision.

Popular Vehicles Using 21" Pirelli P ZERO™

• Audi e-tron GT / A8: AO-marked 21" tyres balance electric performance with executive ride quality.
• BMW 7 Series / i7: The ★-marked fitments are essential for maintaining the dynamics of BMW’s flagship saloons.
• Mercedes S-Class / EQS: MO-marked versions prioritize a near-silent cabin while managing high power outputs.
• Tesla Model S Plaid: ELECT and T0-marked tyres are optimized for extreme electric acceleration and range.
• Porsche Panamera / Taycan: N0-marked tyres ensure the specific handling balance demanded by Porsche chassis engineers.
• Bentley Continental GT: Provides the massive grip required for grand touring at high speeds.
• Lucid Air: Utilizes 21" fitments to deliver high-speed stability and luxury refinement.
• Aston Martin DBS: A standard high-performance fitment for managing extreme V12 power.
• Maserati Quattroporte: Matches the car's Italian performance heritage with elite summer grip.
• Jaguar XJ: Ensures a sporty, planted feel for high-performance luxury saloons.

Load Rating: Maximum Weight Capacity Explained

The load index is a numerical code representing the maximum weight in kgs that a single tyre can safely carry. To ensure safety, the combined capacity of all four tyres must exceed the vehicle’s total weight when fully loaded.

Speed Rating: Maximum Velocity Explained

Represented by a letter, the speed rating indicates the maximum kph a tyre can maintain over a prolonged period. Higher speed ratings are engineered to handle the heat and stresses generated at faster speeds more effectively.

Quick Reference Guide

• Check your requirements: You can find the specific requirements for your vehicle on the tyre information plate (usually located on the driver-side door pillar) or in the owner's manual.
• Replacement rule: It is vital never to fit a tyre with a lower load index or speed rating than those recommended by the manufacturer.
• Common Ratings: Standard ratings include T (190 kph), H (210 kph), and V (240 kph). You can view a full conversion table below..

Maximum Performance. Zero Compromise.

Available 21" Sizes:
These 2026 fitments cater to flagship luxury saloons, high-performance EVs, and super-saloons in the Irish market.

• 245, 30, R21, 91Y, XL
• 245, 35, R21, 96Y, XL, MFS
• 255, 30, R21, 93Y, XL
• 255, 35, R21, 98Y, XL, MFS
• 265, 30, R21, 96Y, XL
• 265, 35, R21, 101Y, XL, MFS
• 275, 30, R21, 98Y, XL
• 275, 35, R21, 103Y, XL
• 285, 30, R21, 100Y, XL
• 285, 35, R21, 105Y, XL
• 295, 30, R21, 102Y, XL 

OE (Manufacturer Approved) & Special Versions:

• 265, 35, R21, 101Y, AO, MFS (Audi)
• 255, 40, R21, 102Y, MO, MFS (Mercedes)
• 275, 35, R21, 103Y, ★, RUN FLAT (BMW)
• 255, 35, R21, 98Y, N0, MFS (Porsche)
• 265, 40, R21, 105Y, ELECT, T0 (Tesla)