- The Super-9 Tubeless Clincher Track Disc wheel, available front and rear, provides track racers exceptional stiffness, aero efficiency, rolling efficiency, power transfer, and lightweight in a Track wheel - In a significant evolution of Track-wheel technology, the Super-9 track disc features a clincher rim designed for tubeless tires - The disc also is compatible with tubes - The rim utilizes a small hook tire bead designed for aero efficiency - A Track-specific carbon laminate adds stiffness to the wheel system - With a refined shape to be faster, the Super-9 Carbon Disc Wheel Tubeless Track disc is the fastest with 23 mm tires on the velodrome - The disc optimizes supreme aerodynamics, power transfer, stiffness, lightweight, and durability - The wheel remains flat from its widest point to the hub and features a proprietary textured surface - The result is unmatched speed on the velodrome