If perfection is the standard then the 303 firecrest wheelset delivers everything you could ask for including a heritage forged and still thriving in the worlds toughest races at the center of the 303 firecrest tubular is the 77177 hubset an innovation that results in improved stiffness durability simplicity and versatility zipps original 303 made history by becoming the first carbon wheelset to win cyclings two most famous cobbled classics paris roubaix and the tour of flanders