Roadstone 245/40 R20 99Y N'Fera SU1 2024

Roadstone N'Fera SU1 245/40 R20 99Y is an ultra-high-performance summer tyre designed for passenger cars and sporty road applications. This configuration combines a 245 mm section width, 40-series profile and 20-inch rim size with a 99Y service description, supporting a maximum load of 775 kg per tyre and a maximum rated speed of 300 km/h. The tyre uses an asymmetric tread pattern and XL construction, making it suitable for compatible vehicles requiring additional load capacity.

About Roadstone N'Fera SU1 245/40 R20 99Y

The Roadstone N'Fera SU1 is developed around responsive road handling, dry and wet grip and high-speed stability. The 245/40 R20 specification is listed as a summer passenger-car tyre, with the 2024 production version identified as Korean-origin. Its XL construction provides additional load capacity, while the asymmetric tread design is intended to balance steering response, cornering stability and water evacuation.

Asymmetric tread and cornering stability

The N'Fera SU1 features an asymmetric tread layout with a reinforced outer shoulder area designed to support cornering stability. The relatively wide 245 mm contact width works with the tread structure to provide a planted feel during directional changes. This makes the tyre particularly relevant to drivers who prioritize controlled handling on paved roads.

Dry-road handling and steering response

The 40-series profile and 20-inch rim combination gives this Roadstone a relatively low-profile configuration. Compared with taller sidewalls, the shorter sidewall can reduce sidewall flex and provide a more direct steering response. The 99Y rating also makes this version appropriate for high-speed road applications when the tyre is operated within the vehicle manufacturer's specified load and pressure limits.

Wet-road grip and water evacuation

Roadstone N'Fera SU1 uses wide longitudinal channels and tread grooves designed to move water away from the contact patch. The EU product information for this exact 245/40ZR20 99Y XL specification lists an A wet-grip class. This supports confident wet-road performance, although actual braking and aquaplaning resistance will vary with tyre condition, inflation pressure, road surface and driving conditions.

High-speed performance and road comfort

The combination of a 40-series profile, XL construction and Y speed rating makes the N'Fera SU1 more focused on responsive paved-road performance than on soft, comfort-oriented driving. The tyre is intended for passenger cars and sporty applications where steering precision and road grip are important. Its EU label lists external rolling noise at 71 dB with a B noise class.

Who should consider this Roadstone?

Roadstone N'Fera SU1 245/40 R20 99Y is a suitable option for compatible passenger cars and sporty vehicles requiring this exact size and service description. It is particularly appropriate for drivers looking for responsive steering, dry and wet-road grip and high-speed stability on paved roads. It is not designed as a dedicated winter or off-road tyre. For customers using Dwbtyres to buy car tyres in UAE, the vehicle placard and existing tyre sidewall should be checked before ordering. Buyers comparing Roadstone Tyres should match the complete 245/40 R20 99Y XL specification.