Review for Zipp 404 Firecrest Carbon Rear Clincher

Our first full-carbon clincher, the 404 Carbon Clincher has been described as the most heavily anticipated wheel of all time. And following two years of development for its revolutionary rim shape and carbon technology, we’re confident that the 404 Carbon Clincher lives up to the hype. Its Firecrest aero profile 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 set putting it among the lightest deep-profile carbon clinchers available. Designed specifically to account for the differences in airflow patterns between clincher tires and tubulars, 404 Carbon Clincher far exceeds the aero performance of any other clincher wheel in its class. As Zipp proved with the Paris-Roubaix winning 303 Tubular, a wider rim offers greater vertical compliance for control and comfort on rough surfaces while increasing lateral stiffness for sprinting and cornering. The same holds true for Firecrest rims with clincher tires. And because the hook beads are farther apart, the tire itself takes on a more stable shape without adding rolling resistance. Heavy, continuous braking on carbon surfaces can cause spikes in rim temperature and tire pressure that impact performance and handling – especially with clincher tires. To solve this challenge, our US-based composites supplier created a new heat-resistant resin exclusively for Zipp. This technology improves heat dissipation so substantially that ours are the only carbon clinchers to pass stringent European safety testing without limitations on rider weight or brake pad options. Naturally, we chose to launch our groundbreaking carbon clincher designs with our most versatile wheel, 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 unrivaled performance of Zipp technology. Weight: 839g Rim Used: X58 Hub Used: 188 Rim Depth: 58.0mm Aero Width: 26.53mm Nominal Tire Bed Width: 16.25mm Spoke Count: 20 Spoke Length Non-Drive: 246mm Spoke Pattern Non-Drive: Cross Spoke Pattern Drive: Radial Spoke Length Drive: 232mm Max Tire Pressure: 125psi Track Adaptable: No Dimpled Surface: Yes External Nipples: Yes

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