The zipp 808 nsw carbon clincher wheelset features the cognition hubset with axial clutch technology to reduce drag by disengaging the rachet mechanism when coasting this allows the rider to approach corners at higher speed and save time the 808 nsw range also features ablc sawtooth dimple design that are specifically clocked to start aerodynamic shearing at a rate of 50hz at 20mph giving riders reduce high yaw drag and improve crosswind stability the zipp 808 nsw carbon clincher wheel