Naturefly 38mm Red Carbon Road Wheel 700c Clincher NF features a 38/50/58/85mm rim that provides aerodynamic advantages while maintaining stable handling in crosswinds for a smooth, stress-free experience even on windy days. A wide, 20.6~23mm brake track gives the tire a secure stance without impacting rolling resistance and increases stability by nearly eliminating the side bulge effect found in tires mounted to narrower rims. The wider rim makes for more tire volume, and that means lower rolling resistance and more confidence for cornering on rails — all while providing a comfortable ride along the way. Compared to many wheels that experience minimum drag numbers at wind angles that rarely occur outside of a wind tunnel, the NF are shaped to handle the windy conditions you'll run into on the actual road. NF brake pads are designed specifically for use with NF carbon rims. While we sometimes take risks on descents, we never do with manufacturers' recommended brake pads. NF also recommends a maximum rider weight of 250lb. NF color design Full carbon Torayca T700 Model: WHL-105 Profile: 38mm Holes: F/20H+R/24H Type: Clincher Weight: 450±20g/F              520±20g/R