ABLC SawTooth™
Notre nouveau design d’empreintes ABLC Sawtooth comporte 12 nœuds qui sont spécifiquement répartis pour que le cisaillement aérodynamique prenne effet à une fréquence de 50 Hz lorsque le cycliste roule à 24 km/h. Sawtooth accomplit cette prouesse en induisant de petites nappes tourbillonnaires qui s’écoulent à faible intensité, mais à une fréquence naturelle plus élevée, diminuant ainsi l’effet de bulle laminaire sur le côté opposé du profil de jante exposé au vent, afin de réduire davantage la forte trainée et d’améliorer la stabilité face aux vents latéraux.
Cognition™ Hubset
Avec le moyeu Cognition™ doté de la technologie Axial Clutch™, nous avons réduit cette résistance en désengageant le mécanisme à rochets dans les descentes en roue libre. Vous pouvez ainsi négocier les virages à plus grande vitesse pour, finalement, gagner des secondes. Un design d’enveloppe de moyeu à tirage droit et flasque en étoile sur le moyeu arrière distribue la charge située sur la flasque du moyeu hors des roulements. Nous avons aussi développé une enveloppe de moyeu unique à bords dentelés pour notre moyeu avant. Ce design dentelé maintient le diamètre d’alésage des roulements en cas de forte tension radiale des rayons. Autrement dit, les roulements silencieux ne changent pas de position, roulent plus vite, durent plus longtemps, et offrent un moyeu latéralement plus robuste.
ImPress™
Nous avons utilisé la technologie ImPress™ de Zipp, qui imprime des graphismes directement sur la roue, pour que les empreintes puissent jouer leur rôle : aider à contrôler le vortex, c.-à-d. le débit d’écoulement de l’air hors de la roue. C’est primordial à la stabilité.
SawTooth™
SawTooth™ is the name given to Zipp NSW’s patented variable depth 53/58mm rims. Developed utilizing the principles of the emerging science of biomimicry, Zipp engineers began the rigorous aero development process of SawTooth™ utilizing the wind tunnel, CFD, and real-world testing. The result is a rim shape that takes nature’s most elegant design solutions and combines engineering precision to deliver a wheel that performs unlike any made before.
This patented new rim shape achieves something conventional aero wheels cannot; it simultaneously reduces both aerodynamic drag and side force for the ultimate in AeroBalance™. Sawtooth™ accomplishes this with a series of patented fin-shaped Hyperfoil™ nodes along the inner diameter of the rim that work together with our new HexFin™ ABLC dimples for improved airflow. The result is Zipp’s highest performing wheelset ever realized with both aero-drag reduction and reduced side force at all wind yaw angles. This is important because higher wind yaw angles are where bike handling is most affected by the wind.
Hyperfoil™
Hyperfoil™ is the name given to the individual nodes on Zipp NSW variable depth Sawtooth™ rims. Each of these patented structures features our HexFin™ ABLC dimples that help to stabilize handling in gusting wind by increasing wind vortex shedding frequency. The higher frequency vortex shedding produced by Sawtooth™ creates a greater number of smaller, less powerful, yet more predictable vortices leading to greater wheel stability. This added stability translates into greater rider control, thereby saving energy that is typically expended trying to hold a line in gusting wind. The result is a faster, more confident riding experience whether you are laying down power or descending sinuous mountain roads.
HexFin™ ABLC
HexFin™ ABLC dimples are the hexagonally shaped depressions found on each Hyperfoil™ of our Sawtooth™ shaped NSW rims. The angular shape of each dimple serves to increase wind vortex shedding to help keep airflow attached to the rim for less aerodynamic drag and improved stability in crosswinds. To further improve the effectiveness of the hexagonal dimples, they are arranged in fin-shaped clusters made up of variable sized dimples that work in concert with each Hyperfoil™ of a Sawtooth™ rim.
Axial Clutch™
Axial Clutch™ technology allows the freehub’s ratcheting mechanism to deliver half the mechanical drag of conventional three-pawl hubs.
AeroBalance™
AeroBalance™ simultaneously reduces both aerodynamic drag and side force
XDR™
The XDR™ driver body is a universal mounting system for cassettes that incorporate cogs with fewer than 11 teeth. It allows for lighter and more versatile drivetrains without requiring new rear axle standards, cassette tools or hub redesigns. The XDR™ interface is 1.85mm longer than XD™ and is designed for road hub applications. XDR™ driver bodies are compatible with all XD™ cassettes when the cassette is installed with a 1.85mm spacer.
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