Zipp 303 nsw the 303 nsw is no lsquorace day onlyrsquo wheelset to be tucked away in a wheel bag until a race number is pinned to the riderrsquos jersey itrsquos built to take the abuse of everyday training rides zipp has achieved this reliability at a lighter weight with a revised carbon fiber layup developed through testing on the famed cobbles of the arenberg forest with the worldrsquos fastest riders hubs with the cognitiontrade hubsetrsquos axial clutchtrade technol