Road bikes are going where theyve never gone before are expected to do more and are being ridden harder than ever at the same time disc brakes are rewriting the rules of whats possible with rim design for this new era the zipp 303 firecrest tubeless disc brake wheelset sets the new standard with an all new disc specific tubeless rim the 303 firecrest carbon clincher is now internally 21mm wide and faster than ever the 45mm deep 303 firecrest delivers unmatched aero performance when