JARGON BUSTED

Key Markings Explained

• XL (Extra Load): Reinforced sidewalls to handle the weight and higher center of gravity of large SUVs.
• FR (Flange Protector): Integrated rim guard to protect alloy wheels from kerb damage.
• AO: Custom-engineered specifically for Audi vehicles.
• MO / MO-S: Engineered for Mercedes-Benz, with MO-S indicating sound absorption technology (Silent).
• VOL: Optimized Original Equipment for Volvo vehicles.
• M+S: Mud and Snow rating (this tyre is still a summer compound and not 3PMSF winter certified).

8 Popular Compatible Vehicles

1. Audi Q7 / Q8: Uses the 275/45 R20 (AO marked) as a standard factory fitment, and the 255/50 R20 (AO marked).
2. Mercedes-Benz GLE / GLS: The 275/45 R20 and 315/35 R20 (MO marked) are primary fitments.
3. Volvo XC90 / Polestar 3: Often uses the 255/45 R20 (VOL marked) or 255/50 R20 fitments.
4. Volkswagen Touareg: Compatible with 255/50 R20 or 275/45 R20 for a robust, performance setup.
5. Porsche Cayenne: Uses sizes like 275/40 R20 (check specific N0/N1 markings for exact fitment).
6. BMW X5 / X6: Compatible with various 20" sizes, often in staggered setups.
7. Jaguar F-Pace: Often utilizes the 255/50 R20 size.
8. Land Rover Range Rover Sport: Compatible with the 275/45 R20 size.

Summer tyres are most common in Ireland, offering peak fuel efficiency mileage and grip when temperatures stay above 7°C. However, they are not the official standard for winter safety. Motorists must show caution in cold conditions; below 7°C, summer rubber hardens, significantly compromising grip and wet braking performance on cold, saturated Irish roads.

All-Season tyres are the superior "fit-and-forget" solution for Ireland's wet, temperate climate. Specifically engineered to remain flexible in the cold, they provide shorter stopping distances on near-freezing, rain-soaked surfaces and carry the 3PMSF certification for frost and light snow. They offer total year-round peace of mind without the hassle of seasonal swaps.

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 20" CUV/SUV Sizes and Markings

• 235/45 R20 100V XL, FR
• 235/45 R20 100V XL, FR, AO (Audi)
• 235/55 R20 102V FR
• 255/45 R20 101W FR, MO-S (Mercedes-Benz Silent)
• 255/45 R20 105V XL, FR, VOL (Volvo)
• 255/50 R20 109Y XL, FR, AO (Audi)
• 265/45 R20 104V FR, MO (Mercedes-Benz)
• 275/40 R20 106Y XL, FR
• 275/45 R20 110Y XL, FR
• 275/45 R20 110Y XL, FR, AO (Audi)
• 275/45 R20 110Y XL, FR, MO (Mercedes-Benz)
• 295/40 R20 106Y FR
• 315/35 R20 111W XL, FR, MO (Mercedes-Benz)