303 firecrest carbon clincher 177 rear 24 spokes black decal if perfection is the standard then the 303 firecrest wheelset delivers everything you could ask for including a heritage forged in the spring classics at the center of the 303 firecrest carbon clincher is the 77177 hubset an innovation that results in improved stiffness durability simplicity and versatility zipps original 303 tubular made history by becoming the first carbon wheelset to win cyclings two most famous cobbled clas