The 303 made history by becoming the first carbon wheel to win cyclings two most famous cobbled classics paris roubaix and the tour of flanders its wider rim provided extra durability and improved aerodynamics that wider rim also led to the development of our revolutionary firecrest174 platform and now the revolution has come full circle the 303 has been completely redesigned with firecrest174 shaping the carbon clincher preserves the aerodynamic advantages of its tubular brother