HED named their C2 series rims after the lower coefficient of rolling resistance (Crr) and higher aerodynamics (Cda) provided by the 23mm wide rims. With 23c tyres, the C2 rim creates a constant tyre profile, rather than getting pinched into the rim. The overall ride quality is improved and the result is tubular-like ride quality from a clincher. Please add what hole count you want in order notes.
Jetnikoff Bicycle Co. are purveyors of high-quality cycling goods, from hand-built wheels to precision-made parts, from around the world.