SunCycling

The 454 NSW Tubular brings together the advanced aerodynamics and stability of its biomimicry-derived Sawtooth™ rim profile with the performance of tubular tires. This wheelset was developed to meet the needs of our sponsored professional racers as well as any cyclist who prefers the time-proven ride qualities of riding tubulars with cutting-edge aero technology.

Utilizing the principles of the emerging science of biomimicry, Zipp engineers studied the environment around them for instances of how nature solved similar problems of speed, control, and efficiency for the next generation of Zipp wheels. Think of a humpback whale’s fast but graceful movements thanks to the special features on the leading edge of its pectoral fins, or the unique micro texture of a shark’s skin, which gives it the ability to glide effortlessly through the water. These structures inspired Zipp advanced development engineers to, for the first time, systematically apply biomimicry to solve the complex challenge of designing a wheel that reduces both aerodynamic drag and side force.

The most visually striking and functionally important innovation in the handcrafted 454 NSW is Sawtooth™. This patented biomimetic 53/58mm-deep 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 HexFin™ ABLC dimples for improved airflow.

The result is Zipp’s highest performing wheelset ever realized with wind tunnel proven 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.

The 454 NSW’s undulating Sawtooth™ rim architecture with HyperFoils™ represents the next evolution of the Sawtooth™ ABLC dimple technology found on all of Zipp’s NSW wheels. The HyperFoils™ and HexFin™ ABLC dimples help to stabilize handling in gusting wind by increasing wind vortex shedding frequency. Lower frequency shedding produces larger, more powerful vortices. In cycling terms, this unstable situation is often referred to as “buffeting.” 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.