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Fronway Speedway 56 – 225/40ZRF18 92W XL Run-Flat

Description: The Fronway Speedway 56 in 225/40ZRF18 92W XL Run-Flat is a high-value Ultra High-Performance (UHP) tyre, specifically engineered to meet the safety and performance demands of premium compacts and sports sedans. This size is a widely used original equipment replacement for vehicles such as the BMW 1 Series, 2 Series, and 3 Series, as well as the Mercedes-Benz A-Class, CLA, and C-Class. It offers drivers the critical safety benefits of run-flat technology combined with sporty handling and reliable all-weather traction.

Key Features and Technical Details:

• Run-Flat Technology (RFT): This tyre is constructed with reinforced self-supporting sidewalls. In the event of a puncture or sudden air pressure loss, the structure supports the vehicle’s weight, allowing you to drive for a limited distance (typically up to 50 miles / 80 km) at a reduced speed to reach a tyre shop safely, eliminating the need for roadside tyre changes.

• Extra Load (XL) Capacity: The 92 load index and XL designation indicate a strengthened casing capable of supporting up to 630kg (1389 lbs) per tyre. This robust construction is designed to handle the additional weight of modern safety systems and the stiffer suspension setups often found on vehicles equipped with run-flats.

• High-Speed Capability: Rated W (up to 168 mph / 270 km/h), the Speedway 56 is categorized for high-performance driving. The ‘ZRF’ code confirms the tyre is a radial run-flat optimized for high-speed stability, ensuring the tyre retains its shape and responsiveness under thermal stress.

• Asymmetric Tread Pattern: The tread features a distinct asymmetric design with a solid center rib for precise steering response and straight-line stability. The outer shoulders are reinforced with large blocks to maximize grip during cornering, offering a sporty driving feel.

• Wet Weather Efficiency: The tread incorporates four wide longitudinal grooves that channel water away from the contact surface efficiently. This drainage system significantly improves wet braking performance and reduces the risk of hydroplaning in heavy rain.

• Noise Reduction Design: To counteract the natural stiffness of run-flat tyres, the Speedway 56 uses an optimized variable pitch tread block arrangement. This design breaks up sound waves generated during rotation, helping to lower road noise levels for a more comfortable ride.