Zipp promises more speed with the deeper version of their whale fin-inspired racing wheel
Zipp 858 NSW Carbon Clincher
Zipp has made a habit of defying
convention when it comes to rim profile. While other manufacturers made flat-sided rims, Zipp adopted a toroidal profile; where others used triangular, pointed profiles, Zipp unveiled a less-tapered shape and a blunt nose. Now, the U.S. company has introduced a lumpy, ‘sawtooth’ profile that takes its design cues from the tubercles found on the front of humpback whales’ fins.
The rim shape may be familiar to you already (we tested the 454 NSW rims in the December 2017 issue), but Zipp’s gone deeper with the 858 version in the hope of delivering a greater aero advantage with better crosswind stability. It’s not just these wheels’ lumps and depth that are important, though. They also carry Zipp’s Axial Clutch in their rear hub, Hexafin dimples on their sides and Showstopper brake tracks around their edges. You can find out how they measure up to the competition in issue 349, on sale 22 February.