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Fronway Speedway 56 – 225/40ZRF19 93W XL Run-Flat

Description: The Fronway Speedway 56 in 225/40ZRF19 93W XL is an Ultra High-Performance (UHP) tyre that incorporates advanced run-flat safety technology. This tyre is engineered for drivers of performance-focused executive and sports vehicles, providing critical puncture protection without compromising handling precision. This specific size is commonly found as a factory or upgrade fitment on high-spec models of the BMW 4 Series, Audi A4/A5, and the Mercedes-Benz C-Class. It delivers a blend of high-speed stability, wet-weather confidence, and the security of limited-distance mobility after a pressure loss.

Key Features and Technical Details:

• Run-Flat Technology (RFT): The defining feature is the reinforced, self-supporting sidewall structure. This allows the tyre to maintain its functional shape and support the vehicle’s weight even after a complete loss of air pressure, enabling the driver to travel safely for a certain distance (typically up to 50 miles / 80 km) at a reduced speed.

• Extra Load (XL) Capacity: The 93 load index means this tyre can support a maximum load of 650kg (1433 lbs) per tyre. The XL (Extra Load) designation indicates a reinforced construction necessary to handle the dynamic forces and increased curb weight associated with modern performance and run-flat-equipped vehicles.

• High-Speed Stability: Rated W (up to 168 mph / 270 km/h), the Speedway 56 is certified for demanding, high-speed applications. The ‘ZRF’ in the size code signifies a high-speed radial run-flat tyre, confirming its structural integrity and performance capability.

• Asymmetric Tread Design: The tyre utilizes a high-performance asymmetric tread pattern. The stiff, continuous center ribs ensure immediate steering response and stability at highway speeds, while the wide, robust outer shoulder blocks maximize the contact patch during aggressive cornering.

• Hydroplaning Resistance: The tread features four deep, wide circumferential grooves designed for rapid and efficient water evacuation from beneath the footprint. This enhances grip and significantly improves braking performance and safety in wet conditions.

• Comfort-Focused Engineering: The tread pattern incorporates a multi-pitch design to break up the harmonic noise frequencies generated by the road surface. This optimization helps to reduce overall road noise, contributing to a quieter and more pleasant driving experience, especially critical in run-flat applications.