ZIPP 404 Firecrest Carbon Tubeless Disc Brake Rear Wheel | Ultimate All-Round SpeedExperience the pinnacle of cycling engineering with the ZIPP 404 Firecrest Carbon Tubeless Disc Brake Rear Wheel. A legendary icon in the world of speed, the 404 Firecrest is meticulously designed for the modern road cyclist, triathlete, and time trialist who demands uncompromising performance. This wheel is your single-wheel solution for every challenge, blending world-class aerodynamics with the stability and control needed to conquer sprints, climbs, and everything in between.Engineered around Zipp's Total System Efficiency (TSE) design approach, the 404 Firecrest is optimized to overcome the four primary barriers to speed: wind resistance, gravity, rolling resistance, and vibration losses. The 58mm rim profile strikes the perfect balance, slicing through the wind on flat roads while remaining lightweight and responsive enough for decisive attacks on climbs. The signature ABLC SawTooth dimple pattern works to manage airflow around the rim, significantly reducing aerodynamic drag and providing unmatched crosswind stability, giving you the confidence to hold your line in gusty conditions.The revolution continues with the hookless (straight-side) rim profile, a key element of the 404 Firecrest´s superior performance. This advanced design creates a more seamless and aerodynamic transition between the tire and the rim. It allows you to run wider tires at lower pressures for a dramatically improved ride experience. This results in lower rolling resistance, a larger contact patch for enhanced cornering grip, and superior vibration damping to reduce rider fatigue over long distances. The result is a faster, more comfortable, and more confident ride.At the heart of the wheelset is the German-engineered ZR1 DB hub, designed for exceptional durability and responsiveness. With 66 points of engagement, the hub provides a lightning-fast response the moment you apply power, ensuring no watt is wasted when accelerating out of a corner or launching an attack. This instant acceleration and robust build quality mean you can rely on the 404 Firecrest for season after season of hard racing and training.The ZIPP 404 Firecrest is more than just a wheel, it´s a comprehensive performance upgrade that makes you faster and more efficient on every ride. Elevate your cycling and discover your true potential on the road.Key Attributes:* Wheel Size: 28´´- 700c* Material: Carbon* Tire Compatibility: Clincher (Tubeless Only)* Brake System: Disc Brake* Rim Profile: High profile > 40 mm* Position: Rear Features:- Rim surface: ABLC SawTooth- Aluminum nipples (Sapim Secure-Loc)- Driver: 6 Pawls Leaf Spring- 66 POE- Bearings: Cartridge - Steel- Max pressure: 73 psi Technical Specifications:- Item type: Wheel- Item name: 404 Firecrest- Size: 700c- Front/Rear: Rear- Use: Road / Triathlon / TT- Brake type: Disc brake- Axle and OLD: 12x142 mm thru axle- Boost compatible: No- Body: SRAM/Shimano Road- Tire type: Tubeless tires only- Speed: 11 speed- Rim: Carbon hookless clinchers- Rim width: 23 mm- Rim profile: 58 mm- Rim color: UD carbon fiber- Mounting type rotor: CenterLock- Hub: ZR1 Disc Brake- Spokes: 24 spokes, Sapim CX-Ray