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Key Markings Explained

• XL (Extra Load): Signifies a reinforced structure to handle heavier vehicle weights.
• FSL (Flange Shield Logic): An integrated feature designed to protect the alloy wheel rim from light kerb damage.
• Summer Performance: These tyres are designed for optimal performance in temperatures above 7°C. They do not carry winter certification (3PMSF or M+S).

Popular Compatible Vehicles (Suggestions)

These sizes are well-suited for many standard CUVs and SUVs popular in the Irish market:

• Nissan Qashqai / X-Trail: Uses the 225/45 R19 or 235/55 R19 sizes.
• Hyundai Santa Fe / Kia Sorento: Compatible with the 235/55 R19 size.
• Volkswagen Tiguan: Can use sizes like 235/50 R19 or 235/55 R19.
• Toyota RAV4: Uses the 235/55 R19 size on some models.
• Ford Kuga: Uses the 235/45 R19 size.
• Audi Q5 / Volvo XC60: Can utilize 235/55 R19 or 255/50 R19 sizes.
• BMW X3 / X4: Compatible with various 19" sizes for a performance summer upgrade.
• Land Rover Discovery: Uses the 255/55 R19 size.
• Jeep Grand Cherokee: Compatible with the 255/55 R19 size.
• Porsche Cayenne: Uses sizes like 255/55 R19 or 265/50 R19 on older models.

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..

Here is a list of common sizes for the Sonar Conqueror SX9 summer tyre range available in the Irish market.

Available 19" CUV/SUV Sizes and Markings (Smallest to Largest)

• 225, 45, 19, 92W, FSL
• 235, 45, 19, 95V, FSL
• 235, 50, 19, 99V, FSL
• 235, 55, 19, 101V, FSL
• 235, 55, 19, 105V, XL, FSL
• 245, 45, 19, 98V, FSL
• 255, 50, 19, 103W, FSL
• 255, 55, 19, 111V, XL, FSL
• 265, 50, 19, 110V, XL, FSL
• 275, 45, 19, 108V, XL, FSL
• 285, 45, 19, 111V, XL, FSL