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The 404 Firecrest wheel offers racing cyclists and triathletes the highest aerodynamic efficiency and advanced technology. In order to optimize the aerodynamic performance, the Zipp engineers rely on the striking ABLC structure. Thanks to the disc-specific design, the innovative surface now extends over the entire rim side. The design is also aerodynamically optimized for use with real 25 mm wide tires and combines low drag with high crosswind tolerance. The Zipp 77 Straight Pull hub in conjunction with the 18 Sapim CX Ray stainless steel knife spokes ensure a stiff and responsive wheel. ABLC The revised ABLC (Aerodynamic Boundary Layer Control) design reduces drag through more and less turbulence to ensure unsurpassed stability and control even in the strongest winds. Flow separation Firecrest technology, from near constant height rims to spoke beds, provides the first aero profile to effectively regulate airflow in the rear half of the wheel. Pressure Center By shifting the center of pressure - the center of lateral forces on the rim - near the steering axle, Firecrest provides stable, reliable handling at any wind angle. Wider rim As the Zipp 303 has shown, a wider rim like Firecrest wheels increases lateral stiffness for optimal sprinting and cornering while providing greater vertical compliance for more control, comfort and durability on rough surfaces.
Maximum tyre pressure 125 psi
Maximum rim width 25 mm
Maximum rider weight 113 kg