Zipp’s 404 Firecrest Tubeless Disc brake is a pro-proven Speed Weapon for any situation. The 404’s heritage as Zipp’s icon of speed extends back decades and its future is even brighter. At 58mm deep the 404 Firecrest Tubeless is ideal for road races time trial and triathlon gran fondos and riding over varied terrain. The wheelset’s 23mm internal width is perfect for running wider tubeless tires at reduced air pressure. That is a vital component of Total System Efficiency™ or TSE™ an approach to speed on ever-changing roads and riding conditions. Specifically TSE™ focuses on overcoming specific barriers to speed: wind resistance gravity rolling resistance and vibration losses. Zipp’s ABLC™ Sawtooth™ Technology uses an intricate dimpling pattern to improve aero efficiency. Zipp’s use of hookless straight side rims in the 404 Firecrest is integral to Making You Faster. With hookless the transition between the tire and the rim is more seamless and aero. Zipp’s hookless rims have more efficient resin distribution which means lighter stronger wheels. At the center of the 404 Firecrest Tubeless Disc-brake is a versatile and durable new hubset the German-engineered ZR1 DB. If you had to choose just one wheel for road riding and racing the 404 Firecrest Tubeless Disc brake is a savvy and speedy choice. FEATURES Versatile aero wheelset for the modern road bike with tubeless and hookless rim profile Optimized tire bed for easy tire installation Wide 23mm rim profile creates a better tire interface to be fast on or off the road New ZR1 DB hub is engineered in Germany with better seal design for improved durability and quicker response with 66 points of engagement Ships with 12mm front and rear end caps Center locking rotor interface. Lockring is included with the wheels XDR™ or SRAM/Shimano driver bodies Campagnolo driver body sold separately Lifetime warranty SPECIFICATIONS SIZE WHEELS 700c RIM CONSTRUCTION Carbon – Hookless TIRE COMPATIBILITY Tubeless tires only BRAKE COMPATIBILITY Disc Center Lock DRIVER BODY TYPE n/a SRAM XDR SRAM/Shimano Road RIM - INSIDE WIDTH 23mm RIM FINISH UD fiber adhesive decals RIM PROFILE Symmetrical SPOKE LENGTH DS 248mm 254mm SPOKE LENGTH NDS 252mm WEIGHT G 1450 WEIGHT BASED ON Estimated lightest weight for wheelset configuration: 12mm through axles and XDR body. No tape or valve included in weight. Not yet final.