Billed as groundbreaking and after two years of near-constant prototyping and refinement, Zipp carbon clinchers have arrived. According to the company, with ‘a revolutionary aero rim shape and carbon materials found nowhere else in the world, the all-new 404 Carbon Clincher is the wheelset you’ve been waiting for.’
Zipp’s Firecrest rim shape is the first deep-profile carbon clincher design to offer the superior aerodynamics, ride quality, strength, and handling of a wider rim body. Yet the 404 Carbon Clincher weighs just 1557 grams per wheelset, putting it among the lightest deep-profile carbon clinchers available. And like all Zipp carbon rims, the 404 Carbon Clincher is handmade in Speedway, Indiana.
To account for the differences in airflow patterns between clincher tires and tubulars, Firecrest employs a complex set of high-radius curves to adjust the width of the rim from 25.5mm at the braking track to 27.5mm at the rim’s widest point. This less tapered version of Zipp’s proven hybrid-toroidal clincher rim shape particularly improves the aerodynamics of the wheel as it rotates within the frame.
With Firecrest and Zipp’s ABLC dimples, the 404 Carbon Clincher claims to far exceed the aero performance of any other clincher wheelset in its class.
Heavy, continuous braking on carbon surfaces can cause spikes in rim temperature, and clincher tires are more susceptible to these effects than tubulars. To solve this challenge, chemists and engineers from Zipp’s composites supplier made repeated visits to the company’s R&D lab to test and refine a new heat-resistant resin based on the materials used in motorsports brake systems.
Available solely to Zipp, this new technology resists heat for more consistent braking performance and tire pressure on long descents.
Naturally, Zipp has chosen to launch its groundbreaking carbon clincher designs with its most versatile wheelset, the 404. Its 58mm rim depth is a classic all-around performer that has carried athletes to victory in every kind of event – triathlons, criteriums, breakaways, field sprints, even Grand Tour mountain stages.
Now, the 404 is available with the convenience of clinchers, the light weight of an all-carbon rim, and the performance of Zipp technology.