JARGON BUSTERS

Quick Guide: Markings & Features

• XL / FR: Reinforced for weight (XL) and integrated Flange Rib (FR) to protect alloy wheels from kerbs.
• OE (Original Equipment): Custom-tuned markings proving the tyre meets the exact standards of manufacturers like MO (Mercedes), AO (Audi), T0 (Tesla), N0 (Porsche), and ★ (BMW).
• RedChili Compound: Allows the tyre to skip a warm-up phase, providing immediate high-safety braking in cold Irish mornings.
• Adaptive Tread: Provides stability and safety on both wet and dry roads by adjusting the contact patch to your driving style.
• EV-Compatible: Low rolling resistance to extend battery range and fuel economy for all vehicle types.

Popular 21" Saloons, Hatchbacks & Estates

• Audi A7 / S7: AO-marked fitments ensure these executive models stop shorter in wet conditions while maintaining a refined, quiet ride.
• BMW 7 Series / i7: The Star (★) marking is vital for preserving the precise steering feel and dynamics of BMW's flagship saloons.
• Mercedes S-Class / EQS: MO-marked tyres are engineered specifically to provide maximum cabin comfort and safety for high-end AMG-Line trims.
• Tesla Model S: T0-marked fitments are optimized for low noise and high energy efficiency, crucial for maximizing EV range in Ireland.
• Porsche Panamera: N0-marked tyres ensure the perfect chassis balance and performance demanded by Porsche engineers.
• Audi e-tron GT: Balances high-performance electric drive with supreme comfort and A-rated wet grip.
• BMW 8 Series: Gran Coupés use 21" to ensure dynamic performance matches their luxurious aesthetics.
• Bentley Continental GT: Provides essential grip required for high-performance grand touring across the country.
• Maserati Quattroporte: Matches Italian flair and performance with elite wet-weather safety characteristics.
• Aston Martin Rapide: A standard fitment for high-performance luxury four-door saloons, demanding elite grip in all conditions.

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..

Available 21" Sizes:
These 2026 fitments are the premium choice for flagship saloons and high-performance EVs, combining elite safety with maximum fuel efficiency.

• 245, 30, R21, 91Y, XL, FR
• 245, 35, R21, 96Y, XL, FR
• 255, 30, R21, 93Y, XL, FR
• 255, 35, R21, 98Y, XL, FR
• 265, 30, R21, 96Y, XL, FR
• 265, 35, R21, 101Y, XL, FR
• 275, 30, R21, 98Y, XL, FR
• 275, 35, R21, 103Y, XL, FR

OE (Manufacturer Approved) Versions:

• 265, 35, R21, 101Y, AO
• 255, 40, R21, 102Y, MO
• 275, 35, R21, 103Y, ★
• 265, 40, R21, 105Y, T0 (Tesla)
• 275, 30, R21, 98Y, N0 (Porsche)