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by Shane Stokes
October 12, 2017
Bennett doubles up with stage 2 win at Presidential Tour of Turkey; Hofland wins the Famenne Ardenne Classic; Santa Rosa fire destroys Leipheimer’s home, BMC service course ‘safe for now’; Sean Kelly: team has reached critical point in negotiations for its survival; Robin Carpenter signs two-year deal with Rally Cycling; Docker inks one-year contract with Slipstream Sports and EF Education First; Manly continues with Orica-Scott; Cycling Australia leans into track, away from road, in pursuit of medals; Changing names: WM3 is now WaowDeals Pro Cycling; Olympians’ chief: ‘We microchip dogs, so why shouldn’t we microchip athletes?’; Silca’s Tire Levers Premio: premium levers optimized for carbon rims; Zipp expands Sawtooth profile to deeper 858 NSW clincher options; Video: How To Foam Roll for cycling. Hype or real?; Video: Off-bike rivalries at the DVV Trofee
Sharing the same biomimicry-inspired (by Humpback whales) Sawtooth rim profile as the 454 NSW’s released last year, Zipp has expanded its premium wavy wheels to include a deeper version, closer to that of the existing 808s. Zipp claims the new wheel to be “faster than an 808. Rides like a 404.”
This new 77-82mm deep rim with its undulating Sawtooth profile is designed to greatly reduce crosswind buffeting, leading to a superior handling wheel. Just like previously seen with the 454 NSW, Zipp claims to have achieved this by “increasing wind vortex shedding frequency. 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.”
The 454 NSW’s rim design is also lighter than that of the 808 NSW Clincher, shaving 60g in the rim brake wheelset. Internal rim width is stated at 17mm, with the rim brake version treated to Zipp’s silicon carbide Showstopper brake track. The wheels feature Zipp’s Cognition hubs (same as those in James Huang’s review of the Zipp 404 NSW wheelset and Sapim CX-Ray bladed spokes.
The Zipp 858 NSW carbon clincher is available in both rim and disc brake variants, with the respective wheelsets claimed to weight 1,650g and 1,834g. Pricing is quoted at US$2,000 / €2,000 / £1,695 / AU$TBC and US$2,400 / €2,400 / £2,035 / AU$TBC for front and rear wheels respectively. Availability expected from November 2017.
Visit Zipp.com for more information.