The Specialized Fast Trak GRID 2Bliss Ready T7 Cross Country Bicycle Tire has become synonymous with fast and lightweight tires that are able to handle the most technical courses and the most grueling conditions.  The Specialized Fast Trak GRID 2Bliss Ready T7 Cross Country Bicycle Tire redefines what was thought possible with a cross-country tread design. Specialized's Block-In-Block design uses a taller adaptable inner block to pierce the ground and claw for traction. The larger outer structure supports the inner block for additional speed, traction, support and stable handling. Adding to this, the Fast Trak profile and knob spacing has been optimized for a wide variety of internal rim widths. The GRID casing provides a light and supple trail construction with additional sidewall protection for durability and sidewall stability. To top off this build Specialized uses their T7 compound to maximize grip and damping.