305/660/18 GoodYear Slick tyre Prototype

Product introduction

The GoodYear Slick Circuit 305/660/18 Prototype tyre, previously marketed under the Dunlop brand, is a competition tyre designed for intensive circuit use. Developed for prototypes and racing vehicles fitted with 18-inch wheels, it delivers a high level of grip, precision and consistency in dry track conditions.

Role of the part

The slick tyre provides the direct link between the vehicle and the track. Its smooth tread maximises the contact patch to optimise traction, braking, stability under cornering loads and cornering speed. The A2 Soft compound is intended to provide rapid warm-up and excellent grip on dry asphalt.

Symptoms or consequences of a worn or faulty tyre

• Loss of grip under acceleration, braking or cornering
• Longer braking distances on track
• Reduced stability at high speeds
• Uneven wear that can upset chassis balance
• Reduced lap performance and less predictable handling
• Increased risk of overheating, vibration or carcass degradation

Benefits of replacement

• Restores optimal grip on dry circuits
• Improves driving precision and confidence under cornering loads
• Optimises traction and braking efficiency
• Enables more consistent use of the chassis' potential
• Suited to the demands of prototypes and competition vehicles
• Soft compound ideal for performance and rapid warm-up

Specifications

• Brand: GoodYear, formerly Dunlop
• Model: Circuit slick
• Size: 305/660/18
• Type reference: 305/660R18 GY SLICK PP 03A2
• Range: Slick
• Use: Circuit, prototype, competition
• Compound: A2 Soft
• Width: 12.5
• Diameter: 687 mm
• Overall width: 333 mm
• Tread: 297 mm
• Weight: 10.97 kg
• Surface type: Dry track
• Road approval: Not intended for road use

Vehicle compatibility

This GoodYear 305/660/18 slick tyre is intended for competition vehicles, prototypes, sports prototypes and racing cars fitted with 18-inch wheels compatible with this size. It is suitable for track fitments requiring a wide, high-performance slick tyre suited to motorsport demands.

Before fitting, check compatibility with wheel dimensions, bodywork clearances, wheel alignment settings, the racing vehicle manufacturer's recommendations and the technical regulations of the relevant discipline.

Conclusion

The GoodYear Slick Circuit 305/660/18 A2 Soft tyre is a high-performance choice for prototypes and competition vehicles seeking grip, precision and efficiency on dry tracks.