Zipp's Project Firecrest Rim

Zipp Speed Weaponrys has developed a new aerodynamic rim shape named Project Firecrest which is applied to the 404 Tubular, 404 Carbon Clincher, 808 Tubular, and 808 Carbon Clincher. The Firecrest rim shape is the first aero concept to focus specifically on controlling airflow around the back half of the wheel.