The zipp 404 nsw carbon clincher wheel is the second wheelset in the zipp nsw series the zipp 404 nsw carbon clincher offers a new rims shape with greater aerodynamic efficiency and reduced side force as well as the new cognition hubset for increased durability and less drag the 404 nsw with a rim depth of 58mm is designed for road cyclists and triathletes looking for increased speed and stability zipp 404 nsw carbon clincher wheel features rim depth is 58mm cognition hubset axia