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Fronway Speedway 56 – 245/45ZRF18 100W XL Run-Flat

Description: The Fronway Speedway 56 in 245/45ZRF18 100W XL Run-Flat is a high-specification Ultra High-Performance (UHP) tyre that combines a capable footprint and dynamic profile with essential run-flat safety technology. This size is a very common fitment for executive sedans and sports coupes, such as the BMW 5 Series, Mercedes-Benz E-Class, Audi A6, and Lexus GS. It is engineered to provide an excellent balance of stable high-speed performance, sharp handling, and reliable wet/dry traction, coupled with the critical safety assurance of limited-distance mobility after a tyre puncture.

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.

• Extra Load (XL) Capacity: The 100 load index certifies this tyre to support a substantial maximum load of 800kg (1764 lbs) per tyre. The XL (Extra Load) designation indicates a reinforced casing structure, which is crucial for safely managing the weight and dynamic forces of modern, heavier luxury and performance 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 performance integrity.

• Asymmetric Tread Design: The tyre utilizes an aggressive asymmetric pattern. The continuous center ribs ensure stable straight-line tracking and responsive steering, while the wide, robust outer shoulder blocks maximize lateral grip and stability during cornering.

• Hydroplaning Resistance: Multiple wide circumferential grooves and strategic lateral channels are integrated across the tread. This efficient drainage system works to rapidly channel water away from the contact patch, significantly enhancing resistance to hydroplaning and improving braking in wet conditions.

• Performance Handling: The 45-series aspect ratio provides a blend of precise handling and sufficient ride comfort. The structure minimizes sidewall flex, translating into sharp steering input and stable road holding.