255/40/18 tyre Yokohama AD09

Yokohama AD09 road approved 255/40R18 99W semi-slick

The Yokohama AD09 tyre in size 255/40/18 is a road-approved semi-slick tyre, designed for demanding drivers looking for a high level of grip, precision and responsiveness. Based on the Yokohama know-how in sports performance, it is aimed at powerful vehicles, road preparations and dynamic uses on the road or occasional circuit.

Purpose of the part

The tyre provides the direct connection between the vehicle and the road. It transmits engine power, supports braking forces, guarantees steering precision and contributes significantly to cornering stability. On a sports car, a high-performance tyre like the Yokohama AD09 allows efficient use of the chassis, braking and traction, while maintaining approval for road use.

Symptoms or consequences of a worn or unsuitable tire

• Loss of grip during acceleration, braking, or cornering
• Extended braking distances
• Less precise steering and less stable behavior
• Irregular wear which may reveal a geometry or pressure defect
• Increased risk of aquaplaning when tread depth is insufficient
• Deterioration of performance on sporty roads or during intensive use

Benefits of replacement

• Improved grip on dry ground thanks to a semi-slick design
• Better driving precision and more direct feedback
• optimised traction on sporty or powerful vehicles
• More effective braking with a tyre in good condition and suitable for use
• More homogeneous behavior during changes of support
• Road approved solution for versatile sports use

Specifications

• Brand: Yokohama
• Model: AD09 (road-legal)
• Category: Semi-slick
• Size: 255/40R18
• Load index: 99
• Speed rating: W
• Type of use: sporty road, occasional trackday, dynamic driving
• Delivery: free only for delivery in mainland France

Vehicle compatibility

This Yokohama AD09 255/40R18 99W tyre is compatible with vehicles originally equipped with or approved for this size, subject to compliance with the load and speed indices recommended by the manufacturer. It is particularly suitable for sports cars, prepared compacts, coupes and high-performance sedans using a suitable 18 inch mount.

• Compatible with 18 inch rims accepting 255 mm width
• To be checked with the original equipment, the vehicle approval form or the manufacturer's recommendations
• Suitable for vehicles Renault Sport, Alpine or other sports models when dimension 255/40R18 99W is permitted

Conclusion

The Yokohama AD09 255/40R18 99W is an excellent choice to improve the grip, precision and dynamic behavior of a sports vehicle, while maintaining a semi-slick tyre approved for the road.