Michelin ZX 135SR15 Michelin ZX Tires are high quality Michelin radials for many popular European applications requiring a 13 inch radial tire and authentic styling. These 13 inch radial tires feature Michelin's ZX tread pattern and an S speed rating. The Michelin ZX was the innovative product of years of tire engineering development. This tire evolved from the revolutionary X Radial and brought even more reliability and performance to the tire market. Radial tires held distinct advantages over the bias ply tires of the era with better ride characteristics and much better tread life. Radials also paid off at the fuel pumps with dramatically increased fuel efficiency. The ZX line draws from an incredible legacy of Michelin Classic tires and is available in popular 13- and 15-inch sizes for American and European automobiles. S Speed Rating S Speed Rated: Up to 112 mph (180 km/h). Often required OE for higher performance trim level classic automobiles. Michelin ZX tire Grip on slippery roads. Thanks to huge numbers of tread pattern sipes, this tire provides more grip during all weather conditions compared to the MICHELIN X. Radial technology. The advantages of the radial tire compared to the conventional tire can be seen in all areas: Great safety: significantly improved road holding, grip and braking • Economy in use: significant reduction in fuel consumption • Great comfort thanks to the flexibility of the sidewalls. Michelin Brand Collector Vehicle Tires Michelin is known for its high quality tires, and we keep thousands of popular Michelin tires in stock every day. Our Michelin product offerings include fitments from the 1920's all the way into the 2000's, with an intense focus on classic sports cars. Build quality, fitment options and period correct styling makes the Michelin product line a favorite among sports car enthusiasts around the world. 135R15 Tire Conversion Chart Similar Size Radial Alternative: 135/80R15