If you need confirmation that technology is changing road bikes for the better, the 404 NSW Carbon Clincher Tubeless Disc-brake wheel leaves no doubt. Zipp's 404 wheels – with their 58mm rim depth – are synonymous with all-around high performance. NSW technology adds to this legacy enhanced aero performance and tubeless compatibility, all with the benefits of disc brakes. The new NSW Carbon Clincher Disc-brake wheel is aerodynamically optimized for wide tires to meet the performance needs of modern riders in search of low rolling resistance and high comfort. Throughout the development process the engineers carefully considered the rim-to-tire interface and how specific tire and rim widths affect aerodynamic performance. Rim depth and shape along with tire selection were all carefully considered throughout the development process. The 404 NSW, with an internal width of 19 mm, is optimized for smoother pavement and is aerodynamically optimized for 25 mm tires. By extending the patented ABLC Sawtooth dimples all the way to the rim's edge on each of the wheels, NSW disc brake rims deliver higher frequency wind vortex shedding for best-in-class crosswind stability. To ensure the exacting manufacturing standards are met, all NSW rims are handmade in Indianapolis.