Plews Tyres Ultra Mousse Rear. 140 / 80 – 18 Standard. The PLEWS Tyres Ultra Mousse Rear 140/80 – 18 Standard tyre is specifically designed for high performance off-road motorcycles. Made in Italy, this tyre features a section width of 140, an aspect ratio of 80, and a wheel diameter of 18 inches. With run flat capability and NHS speed ratings, this tyre is ideal for motocross enthusiasts looking for a reliable and durable option for their rear wheel. Upgrade your motorcycle with this quality PLEWS TYRES product to enhance your riding experience. Same day despatch on orders paid for before 12 noon!