Specialized Ground Control Sport Tire Description: The Specialized Ground Control Sport mountain bike tire is an exceptionally versatile XC/Trail tire that utilizes a tread optimized through block-in-block technology. This means that the tire has taller adaptable inner knobs to pierce the ground while the larger outer structure of the knobs provides support for fast rolling characteristics. Features: Versatile tread pattern designed for use on XC or light trail applications Block-in-block technology provides traction, speed, and stable handling Wire bead is tough and durable Specifications: Tire Type: Clincher Bead: Wire Compound | Casing: 60a | - TPI (Threads Per Inch): 60 TPI Puncture Protection: - Inflation: 25 - 50 PSI Color: Black Weight: -