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Fronway Speedway 56 – 275/40ZRF20 102W Run-Flat

Description: The Fronway Speedway 56 in 275/40ZRF20 102W Run-Flat is an Ultra High-Performance (UHP) tyre that combines a large 20-inch diameter with essential run-flat safety technology. This size is primarily designed for high-end luxury SUVs, performance crossovers, and sports sedans, such as the Porsche Macan, BMW X5, and Mercedes-Benz GLE, often used on the front or rear axles. It is engineered to deliver stable, responsive handling and high-speed integrity, providing the crucial security of limited-distance mobility after a tyre pressure loss.

Key Features and Technical Details:

• Run-Flat Technology (RFT): The defining safety feature is the heavily reinforced, self-supporting sidewall structure. This allows the tyre to maintain its structural integrity and support the vehicle’s weight following a complete loss of air pressure, enabling the driver to continue driving safely for a limited distance (typically up to 50 miles / 80 km) at a reduced speed.

• High Load Capacity: The 102 load index certifies this tyre to support a substantial maximum load of 850kg (1874 lbs) per tyre. This high load rating is critical for managing the significant curb weight and dynamic forces associated with modern performance SUVs and executive vehicles.

• High-Speed Stability: Rated W (up to 168 mph / 270 km/h), the Speedway 56 is certified for demanding, sustained high-speed applications. The ‘ZRF’ in the size code confirms a high-performance radial run-flat construction, optimized to resist heat build-up and maintain stability under load.

• Asymmetric Tread Design: The high-performance asymmetric tread pattern utilizes continuous center ribs for excellent straight-line tracking and responsive steering. The wide, robust outer shoulder blocks maximize the contact patch during cornering, ensuring superior lateral grip.

• Wet Weather Control: Multiple wide circumferential grooves and lateral siping details are integrated to effectively channel water away from the contact patch. This efficient drainage system significantly enhances resistance to hydroplaning and ensures reliable braking performance in wet conditions.

• Handling Optimization: The 40-series aspect ratio provides a blend of precise handling and sufficient ride comfort. The low profile minimizes sidewall flex, translating into sharp steering feel and stable road holding, essential for performance driving.