As the inaugural wheelset in the Zipp NSW Series, Zipp 808 NSW Carbon Clincher offers a groundbreaking rim shape with greater aerodynamic efficiency and reduced side force as well as a new hubset for increased durability and less drag. The 808 NSW, with a rim depth of 82mm, is designed for triathletes, time trialists or any cyclist looking for increased speed and stability.
The 808 NSW leverages Zipp’s advanced technologies for tangible gains in aerodynamic efficiency and stability. The 808 NSW provides a 3-4 watt savings compared with the bench mark for excellence, the 808 Firecrest, which means an estimated 90 seconds at 40km per hour over 112 mile (180.25km) Ironman® -distance.
Zipp 808 NSW was developed using more than 40 concept studies using CFD (Computational Fluid Dynamics) post-processing software and multiple wind-tunnel trips, including the Aerodynamic Bike Testing Facility at the ARC Wind Tunnel in Indianapolis near Zipp’s facility.
Zipp 808 NSW technology was ridden to 1-2 finishes in two world championship events just as it was being introduced in 2015. In triathlon, Jan Frodeno of Germany won 70.3® World Championships in Austria while fellow German Sebastian Kienle was second. In cycling, Velocio-SRAM Pro Cycling captured gold at the Elite Women’s Team Time Trial and Boels-Dolmans Cycling Team the silver at the UCI Road World Championships in Richmond, Virginia.
The Cognition™ hubset with Axial Clutch™ Technology reduces drag by disengaging the ratchet mechanism when coasting. So you can approach corners at higher speeds, and ultimately, save time. A star-flanged straight-pull hubshell design on the rear hub distributes the load placed on the hub flange away from the bearings. We’ve also developed a unique scalloped edge hubshell design for our front hub. This scalloped design maintains the bearing bore diameter when high radial spoke tension is applied. That means you get bearings that quietly stay in place, roll faster, last longer, and provide a laterally stiffer hub.
We’ve employed Zipp’s ImPress™ graphics technology, which prints graphics directly on the wheel, to help allow the dimples to do what they were design to do – help control vortex shedding, the rate at which air sheds off the wheel. Managing this is crucial to stability. ImPress graphics also give 808 NSW a distinctive stealthy look.
Our new Sawtooth dimple design consists of 12 nodes that are specifically clocked to start aerodynamic shearing at a rate of 50hz at a rider speed of 20mph. Sawtooth accomplishes this by inducing small sheet vortices that shed at a low magnitude, but at a higher natural frequency, thus decreasing the laminar bubble effect on the aerodynamically shielded side of the rim’s profile to further reduce high yaw drag and improve crosswind stability.
Our industry leading silicon carbide Showstopper™ brake track continues to evolve and improve, providing unmatched stopping power and modulation regardless of weather conditions or the length of the descent.
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