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Fronway Speedway 56 – 275/40ZRF19 101W Run-Flat

Description: The Fronway Speedway 56 in 275/40ZRF19 101W Run-Flat is an Ultra High-Performance (UHP) tyre specifically designed for the rear axles of high-powered, staggered-fitment sports cars and luxury sedans, as well as on all four corners of certain performance crossovers. This size is commonly fitted to vehicles like the BMW 5 Series, Mercedes-Benz E/CLS-Class, and performance versions of the Audi A7/A8. It is engineered to handle massive power and cornering forces, delivering superior stability and grip, combined with the essential safety net of run-flat technology.

Key Features and Technical Details:

• Run-Flat Technology (RFT): The defining safety feature is the heavily reinforced, self-supporting sidewall structure. In the event of a tyre puncture and subsequent air pressure loss, these robust sidewalls prevent the tyre from collapsing, 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 101 load index certifies this tyre to support a substantial maximum load of 825kg (1819 lbs) per tyre. This high load rating is critical for managing the significant weight and dynamic forces of modern high-performance and luxury 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 structural integrity.

• Wide Asymmetric Tread Design: The wide 275mm tread utilizes an aggressive asymmetric pattern. The large, stiff outer shoulder blocks maximize the contact patch for immense lateral grip during hard cornering, while the continuous center ribs ensure immediate and precise steering response.

• Wet Weather Control: Four wide, deep circumferential grooves are integrated into the design for rapid and efficient water evacuation from the footprint. This critical drainage system significantly enhances hydroplaning resistance and improves braking and traction in wet conditions.

• Handling Optimization: The low 40-series aspect ratio contributes to minimal sidewall flex, ensuring a direct and sharp steering feel. This structure maintains a consistent, optimized contact patch with the road surface, which is vital for maximum grip under power.