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Sidewall Markings Explained:

• BSW: Black Sidewall.
• OWL: Outlined White Letters (popular aesthetic).
• M+S: Mud and Snow rated.

Sidewall Markings Explained:

• XL (Extra Load): Reinforced construction to support the weight of large SUVs and towing stresses.
• OWL (Outlined White Letters): Available on the 255/55 size to give premium 4x4s a distinctive, rugged appearance.
• BSW: Black Sidewall for a cleaner, stealthier look.
• M+S: Mud and Snow rated for enhanced performance on loose Irish terrain.

Popular Compatible Vehicles

• Land Rover Discovery (Gen 4 & 5): The 255/55 R19 is the benchmark size for owners who want to take their Discovery off-road while keeping the original 19" alloys.
• Range Rover Sport: Frequently fitted with the 255/55 R19 for drivers requiring better durability on rural tracks and gravel.
• Volkswagen Amarok / Ford Ranger: Owners with 19" wheel upgrades often use the 255/55 R19 for an All-Terrain look.
• Volkswagen Touareg: The 255/60 R19 offers a taller, more robust sidewall for light off-road use.
• Toyota Land Cruiser: Certain 19" wheel packages are compatible with these sizes for a more aggressive 70/30 performance split.

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..

In 2026, the Sonar Conqueror SX-6 19" range serves high-specification pickups and modern SUVs in Ireland. Maintaining its 70/30 on/off-road split, this range offers the rugged aesthetic of an All-Terrain tyre with the refined diameter required for premium wheel fitments.

Available 19" Sizes and Markings

• 255/55 R19 111H XL OWL
• 255/60 R19 113H XL BSW