Images are for illustration purposes only please check the specification section for a full and accurate listing of the cervelo s3 ultegra disc the cervelo s3 ultegra disc road bike 2017 returns with a completely redesigned chassis that rolls top notch aero dynamics stiffness and versatility into one to create the ultimate road racing bike the fully carbon frame of the cervelo road bike has received a few key altercations to help drastically improve aero dynamics without