The Kumho Ecsta 4X is an ultra high performance all-season tire specially developed for drivers who are looking for year-round traction, longer treadwear, and durability. Ideal for sporty coupes, sports cars, and performance sedans, the Kumho Ecsta 4X gives you confidence to drive on the road even when you don't know what the weather forecast will be. It features a specially formulated compound consisting of polymer blend, new resins, and high-dispersion silica which all work together to deliver superior wintertime performance, increased flexibility, and extended treadlife. This special compound is then molded into an asymmetric tread design which have intermediate tread blocks and large outboard shoulders to provide sporty handling and quick response. To get the most out of the Kumho Ecsta 4X, it is recommended to use them in sets of four. It is backed by a 40,000-mile treadwear warranty.