ICAN 38mm 700c Road Carbon Clincher Racing Wheels Basalt Brake Surface Sapim Cx-ray Spokes Lightweight carbon fiber road bike clincher wheelset Recommended for:road bikes, cyclocross bikes, triathlon bikes, time trial bikes. 23mm wide rim, increase aerodynamics and improve handling-the rim's 23mm width improves aerodynamics by creating a more uniform airflow over the wheel, balancing the aerodynamic forces of the rim with the leading edge of the tire Aero bladed sapim spokes-increase wheel strength and improve aerodynamic speed Warranty: 2 years