A workhorse unleashed. The 2018 Cervelo S3 Ultegra Di2 Disc is stiffer and more aerodynamic than its rim-brake counterpart, while continuing to make the most of the lightweight design rooted in Cervelo's Project California research facility. All of this translates to superior handling and control, giving you the confidence to pull away from the peloton or put the hurt on a Saturday morning group ride. Built on an ultra-lightweight Cervelo carbon frame, the S3 Disc features effortless Shimano Ultegra Di2 8070 electronic shifting, powerful Shimano Ultegra hydraulic disc brakes, high-quality ENVE SES 3.4 wheelset, Cervelo Carbon Aero seatpost and handlebar, and a supportive Kootu saddle. Stiffer, better-riding, aero as ever.