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In 2026, Irish drivers generally choose between two main options based on their year-round needs:
Summer Tyres: Optimized for maximum performance and safety when temperatures are above 7°C. While standard in Ireland, they lose grip in freezing conditions.
All-Season Tyres: A versatile hybrid designed to work safely from -10°C to 30°C. They offer a reliable compromise for dry, wet, and lightly snowy roads without the need for seasonal changes.
Because Ireland’s temperate climate rarely sees extreme snow, many drivers use summer tyres year-round, though all-season tyres are increasingly popular for added winter security.

Key Markings

• XL is Extra Load (Reinforced).
• MFS denotes Maximum Flange Shield/rim protection.
• N0 is a manufacturer-specific Original Equipment marking for Porsche vehicles. These sizes are commonly used in staggered fitments (different sizes on front and rear axles) for models like the Porsche Cayenne.

Popular Compatible Vehicles

• Porsche Cayenne: The 21" sizes (285/40 R21 front and 315/35 R21 rear) are specifically designed as a staggered fitment for the Porsche Cayenne. The N0 marking confirms they meet Porsche's exact standards for handling, noise, and high-speed stability.
• Porsche Panamera (Wagon/Sedan): While the Cayenne is the primary SUV fitment, some Panamera models can use a variation of these high-performance tyre sizes.
• Audi Q7/SQ7 (Compatible): While typically using 20" or 22" OE fitments, these models can sometimes use the 285/40 R21 size as an aftermarket or optional upgrade, though without the specific Audi "AO" marking.
• Volkswagen Touareg: As a platform relative to the Cayenne, the Touareg can accommodate these large sizes in some specifications.

LOAD RATING  (the number)
This number tells you how much weight ONE tyre can safely carry
The higher the number, the more weight it supports
All four tyres together must safely support the full vehicle weight

Rule: Always match or exceed the vehicle’s required load rating.
Rule: Never fit a lower speed rating than the manufacturer specifies.

Available 21" Sizes

• 285, 40, 21, 109Y, XL, N0, MFS
• 315, 35, 21, 111Y, XL, N0, MFS