454 NSW Tubeless Disc-brake wheels are the ultimate choice for road racing, delivering everything the performance cyclist demands. The design fuses two of Zipp’s most advanced approaches; the Sawtooth rim profile and TSE, for an all-encompassing approach to performance. At the center of the 454 NSW is the Cognition V2 Hubset, re-engineered with an updated Axial Clutch V2 mechanism for quicker engagement and lower friction as well as improved durability.