With the world of competitive cyclocross in mind the a1r cx was designed to win races colnago racing geometry developed through years of experience with the greatest champions of the discipline has proven to be extremely successful winning many world cups and world championships the a1r cx has all you need for the highest levels of competition shimano 105 drivetrainlight action vivid shifting is just one of many features taken from shimanos top end groupsets making the 105 11 speed 580