Pronounced "cross king" , the X-king perfectly fills the gap between the Race King and Mountain King II in terms of application. Besides the standard version, highend, German made versions are also available in the for of ProTection and RS models, both featuringour legendary BlackChili compound. Couple this with cleverly designed tread pattern which provides ample traction yet the minimal rolling of a much less aggressive pattern. Tires with Black Chilli Compound deliver a performance that had not yet been reached. Compared to silicia tires, tires using black chilli provide 26% lower rolling resistance, 30% higher grip, and 5% longer miliage. Pro Tection tubeless-ready performace previously stood primarily for sidewall protection, but our latest generation combines a unique casing ply with a UST-style bead for Conti's Revolution Tubeless Ready design. An additional layer of rubber coated, high strength nylon the spans the complete width of the tire, not only additional durabilty, but also serves to maintain air tightness in a tubeless-ready configuration.