With the depth and shape proven in all conditions, the 404 Firecrest is the all-around performer and the standard by which all other wheels have been measured. Its 58mm rim depth is a classic all-around performer that has carried athletes to victory in every kind of event and situation –every triathlon distance, breakaway, field sprint, and hilly finish.

The 404 Firecrest Carbon Clincher is where the Firecrest® Revolution began as the first deep-profile carbon clincher design to offer superior aerodynamics, ride quality, strength, and handling of a wider rim body. Yet the 404 Firecrest Carbon Clincher weighs 1,690 grams per set, providing best-in-class performance at a lightweight.

At the center of the 404 Firecrest is Zipp’s 77/177 hub set with best-in-class durability and improved bearing protection with no pre-load adjustment needed. The result is improved stiffness, durability, simplicity, and versatility.  To accommodate an 11-speed cassette and a Shimano/SRAM hub, the rear 404 wheel features a DT Swiss 240s hub and Sapim® aero spokes in black.

• Optimized flange geometry and spoke hole attachment pattern with Sapim® CX-Sprint spokes to optimize torsional and lateral stiffness and robustness.

• Includes quick-release skewers to provide leverage for easier opening and closing, when closed, the lever contours neatly with the frame.

Designed specifically to account for the differences in airflow patterns between clincher tires and tubulars, the 404 Firecrest Carbon Clinchers still exceed the aero performance of most other clincher wheels in their class.  The wider rims offer greater vertical compliance for control and comfort on rough surfaces while increasing lateral stiffness for sprinting and cornering. 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 U.S.-based composites supplier created a heat-resistant resin exclusively for Zipp. This technology improves heat dissipation so substantially that 404 Carbon Clinchers have never had a heat-related failure.  The provided decals were never applied to the wheels to save rotational weight.

The DT Swiss 240s road hub hits the sweet spot between lightweight and reliability. Lace it up and it'll roll for thousands of nearly frictionless miles. The legendary Star Ratchet System ensures precise engagement and exceptional dependability, no matter how hard you stomp on the pedals.