Zipp 353 NSW Tubeless Disc-brake is the culmination of our pursuit of versatility and speed. This wheel fuses Zipp's two most advanced approaches, the Sawtooth™ and TSE™ rim profile, for a complete approach to performance. With its 45mm deep wavy rim shape, the 353 NSW offers speed on any terrain with best-in-class aerodynamic efficiency and crosswind stability. Zipp's use of hookless (straight side) rims in the 353 NSW is integral to achieving the Making You Faster mission. With hookless, the transition between tire and rim is smoother and more aerodynamic. Zipp's hookless rims have more efficient resin distribution, which means lighter wheels. They are also very durable. The Zipp 353 NSW's Sawtooth™ rim shape with Hyperfoils™ optimizes aerodynamic efficiency and crosswind stability. The Sawtooth™ design also allows the rim to be structurally strong yet lightweight. This will help you exit corners and maintain that speed regardless of the terrain, especially steep and rough terrain. The 353 NSW uses Zipp's Total System Efficiency™ or TSE™ approach to wheel design: overcoming specific barriers to speed: wind resistance, gravity, rolling resistance and vibration losses. The wheelset's 25mm internal width is ideal for running wider, lower-air-pressure tubeless tires for more efficient riding. At the heart of the 353 NSW is the redesigned Cognition V2 hub set with an updated Axial Clutch V2™ mechanism for faster engagement and lower friction, as well as increased durability.