Remastered and Ready to Race. A redesigned profile makes the XC-Master the go-to cross country tire for excellent steering and control. Its X-knob tread pattern delivers superior handling while the puncture-resistant casing was formulated with the endurance necessary to handle cross country rides and races. Available in both front and rear tire designs. Sold individually. Tire Specifications: Ply rating: 6-ply. Tread depth (inches): 15/32. Outer diameter (inches): 21.3. Section width (inches): 7.0. Recommended rim width (inches): 5.5. Weight (pounds): 12.00. Maximum PSI: 7. Maximum load (pounds): 235.