Zipp has literally gone deep with its new 858 NSW carbon clincher wheelsets, which feature a 77mm/82mm deep rim profile for both disc and traditional caliper brakes.
The new 858 NSW apply the same biomimicry-derived Sawtooth rim technology found in Zipp’s previous 454 NSW, which the brand refers to as AeroBalance. To wit, “whether you are a triathlete or a road rider looking for the ultimate in aero performance, the 858 NSW is engineered to make the impossible… possible. Its advanced AeroBalance and handling performance changes the way we think about aero-wheel selection. By minimizing concerns over control, the 858 NSW ushers in a new era where aerodynamically efficient deep-section wheels are no longer reserved only for ideal racing conditions—the 858 NSW is an every-condition race wheelset.”
According to Zipp, it’s Sawtooth design has resulted in even lower aerodynamic drag and additional crosswind stability for the 858 NSW, allowing riders to remain in an aero position for ecteded periods of time, especially when dealing with crosswinds.
“Energy that would have been expended trying to keep the bike going in a straight line with a conventional wheel. That energy can now be used to propel the bike to higher speeds. Moreover, the confidence inspiring stability of the 858 NSW leaves a rider’s mind free to fully focus on the task at hand: Putting power to the pedals”, says Zipp.
Zipps explains, the 858 NSW achieves this aerodynamic performance through high-frequency wind vortex shedding. Lower frequency shedding produces larger, more powerful vortices. In cycling terms, this unstable situation is often referred to as “buffeting.” The 858 NSW’s undulating Sawtooth rim architecture, which comprises Zipp’s HyperFoils and HexFin ABLC dimple technology, helps to stabilize handling in severe wind situations, by increasing wind vortex shedding frequency. Furthermore, the higher frequency vortex shedding produced by these structures creates an increased number of smaller, less powerful, yet more predictable vortices leading to greater wheel stability.
Therefore, according to Zipp, whether someone is riding in a crosswind or not, the Sawtooth rim design of the 858 NSW also delivers a laterally stiffer, lighter, more nimble wheel that accelerates up to speed faster for improved handling in any riding condition.
The 858 NSW will become available next month, with pricing at $4,400 for either the disc brake or caliper version.
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When it comes time to control that speed, the rim brake version of the 858 NSW comes equipped with our silicon carbide Showstopper brake track. Showstopper allows later braking with more stopping power and greater control—regardless of weather conditions or the length of the descent. With braking performance that is superior to aluminum rims, even when wet, Showstopper provides enhanced rider confidence and safety. And with Zipp’s record of no heat-related failures, you can rely on this performance no matter where you ride.
In addition to our advanced carbon layup, perfected over 30 years of experience with the material, our ImPress technology keeps both the 858 NSW rim brake and disc brake wheels as light as possible by printing graphics directly onto the rim. ImPress also helps our HexFin ABLC dimples to dotheir aerodynamic job while elevating the wheel’s visual allure to new heights.
Yet all of this technology does not come at the expense of practicality. The 858 NSW is designed to use external spoke nipples for easy servicing. We’ve also designed the shape of the rim bed to make changing tires simple and quick, even without tire levers. And on the disc brake version of the 858 NSW, we’ve selected a center locking disc brake interface to make brake rotor installation and removal as fast as possible.
Beyond the Rim
Our NSW-exclusive Cognition™ hubset allows the 858 NSW to roll efficiently whether you are pedaling or coasting. Axial Clutch™ technology allows the freehub’s ratcheting mechanism to deliver half the mechanical drag of conventional three pawl hubs. With less internal hub drag a rider can achieve higher average speeds when coasting, or opt to stop pedaling a moment sooner before entering a corner and bank that wattage for use exiting the corner.
Axial Clutch technology also allows riders to maintain speed through corners that don’t require braking input, thereby increasing corner exit speeds.
Inside the Axial Clutch mechanism we use magnets, rather than steel springs, to move and engage our light weight Metal Injection Molded (MIM) ratchet rings for unrivaled reliability and consistent operation. With 36 points of engagement that all interlock simultaneously, there isn’t a more secure freehub mechanism on the market. And to ensure that the Cognition hubset is as robust as it is fast, we use Swiss bearings made to our exacting specifications.
Each Indianapolis-made 858 NSW rim requires 12.5 hours to create and represents a true blending of hand craftsmanship and advanced manufacturing techniques. 858 NSW rims are laced by hand to our Portuguese-made Cognition hubs using Belgian Sapim® CX-Ray spokes and Secure Lock nipples for superior performance and reliability that is made to last.
858 NSW Carbon Clincher Disc Brake
MSRP: Front wheel: $2,000, €2,000, £1,695âï¿½¨Rear wheel: $2,400, €2,400, £2,035
Retail Availability: November 2017
858 NSW Carbon Clincher Rim Brake
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