The Zipp 303 Firecrest Rear Wheel is as adept in the mountains as it is on rolling hills, windswept farm lanes, or ferocious field sprints. It has a revised rim profile for reduced aerodynamic drag developed by an advanced development team in Indianapolis, Indiana, USA. The ABLC Sawtooth Technology, is a complex dimpling pattern first developed for the top-level NSW wheel lineup. At the center of these wheels is the pro-proven 77/177 hubset. Its optimized flange geometry and spoke hole attachment pattern is paired with Sapim CX Sprint spokes to optimize torsional and lateral stiffness and robustness. Each wheel includes a quick-release skewer with a wide, more ergonomic handle to provide more leverage for opening and closing.