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 prove the tyre meets the exact standards of manufacturers like MO (Mercedes), AO (Audi), and ★ (BMW).
• 3PMSF Symbol: (Three Peak Mountain Snowflake) Official certification for legal use in severe winter and snow conditions.
• Chili Compound: Ensures peak grip without a warm-up phase, vital for cold Irish mornings.
• High Mileage: Offers superior value with very low tread wear on test, providing high mileage.
• EV-Compatible (EVc): Mark indicates the tyre is optimized for high torque, low noise, and preserves battery range

Popular 21" Saloons, Hatchbacks & Estates 

Note: 21" All-Season tyres are primarily used on premium performance SUVs, with some fitments for executive electric saloons. 

• Audi e-tron GT: Uses sizes like 265/35 R21 to balance electric performance with all-weather safety.
• Tesla Model S: The T0-marked sizes are essential for managing instant torque in varying Irish conditions.
• Jaguar I-PACE: Benefits from the high load index and all-weather capability of these larger fitments.
• Porsche Taycan: Popular as an all-season option for those who want consistent safety in a high-performance EV.
• Audi A7/S7: High-spec models use 21" for visual impact and enhanced all-weather handling confidence.
• BMW 7 Series: Ensures comfort and control in the flagship saloon during cold, damp Irish winters.
• Mercedes S-Class/EQS: Delivers luxury comfort and silence with the added security of year-round certification.
• Volvo V90: Provides robust stability and safety for heavy hybrid models, though 21" is a rare fitment.
• Bentley Continental GT: A suitable choice for drivers seeking year-round usability for their grand tourer.
• Maserati Quattroporte: Offers an all-season option for the executive saloon, balancing style with practicality.

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 tailored for Ireland's mild, damp climate, offering 3PMSF-certified winter safety and summer longevity for premium vehicles.

• 235, 45, R21, 101T, XL, FR
• 245, 35, R21, 96Y, XL, FR
• 255, 40, R21, 102T, XL, FR
• 265, 35, R21, 101Y, XL, FR
• 265, 40, R21, 105Y, XL
• 275, 35, R21, 103Y, XL
• 275, 45, R21, 110Y, XL, FR
• 285, 40, R21, 109Y, XL, FR