The Zipp 404 Firecrest Tubeless Disc Rear Rim is all about road riding and racing. Without the constraints of rim brake caliper compatibility or brake-track requirements, the new Firecrest Carbon Clincher Tubeless Disc-brake wheels offer the increased stopping power and modulation of disc brakes and a whole lot more.
To maximize the aero performance of the wheels, Zipps ABLC™ dimples extend all the way to the outer edge of the disc-specific rims. The new wheels are also optimized for wider tires to meet the performance needs of modern riders in search of low rolling resistance and aero efficiency with high comfort. The refined rim shape improves Firecrests ability to yield low aerodynamic drag and high crosswind stability, a combination we call AeroBalance™.A new carbon fiber layup for the Indianapolis-made rims keeps weight low while maintaining the Firecrest Carbon Clinchers proven durability. The robust 77D/177D hubset, paired with 24 Sapim® CX-Sprint spokes front and rear, keeps the wheels stiff and responsive. To ensure compatibility with any bike, our versatile 77D/177D hubs come with swappable end caps to work with QRs and thru-axles, including 12x100mm and 15x100mm front thru-axles as well as 12x142mm rear thru-axles. The 177D rear hub is also XDR driver body compatible for use with SRAM 10-42 cassettes.