Colnago c rs road bike ultegracolnagos c rs is an entry level carbon frame road bike and has a monocoque design which was developed with the philosophy gained from over sixty years of experience designing the most successful road bikes in the world internal cable routingthe c rs was fashioned to meet the demands of cyclists looking for a first rate road bike without compromise the internal cable routing amongst other features easily stack up aesthetically against top class bikes ultegra gr