We may not be winning the coveted green jersey at our finish line, but you can bet we're giving it our all from the minute we start off the line with the S5 Ultegra Di2 Road Bike. This bike is preferred by the fastest sprinters out there, utilizing a stiff frame with wind-tunnel tested aerodynamics that turns all of our pedaling power into forward momentum. The S5 is so much more than that though. The S5 also delivers impressive comfort thanks to Cervelo's carbon engineering that enhances the overall ride feel and vibration-damping compliance. No matter the race, the S5 excels at getting us to our top speeds, and it does so without beating us up along the way. The bike is outfitted with Shimano electronic Di2 shifting that's intuitive and reliable, as well as Reserve carbon wheels that slice through the wind while offering precise cornering abilities. Of course, we should bring attention to Cervelo's now-iconic V-Stem. The V-shaped profile is the result of restless aerodynamic research with the result being outstanding wind-cheating properties to help us keep up light, fast speed with ease. The frame's stiffness, geometry, layup, and TrueAero tube shaping are all combined to make for a bike that's comfortable enough to spend all day on, and with quick acceleration to boot. With the BBright system, stiffness is increased to make for fantastic pedaling efficiency. And, we appreciate that the S5 is fully capable of clearing 28-millimeter tires. Please note that because the S5 uses a one-piece integrated stem and handlebar, it is best that you contact a Competitive Cyclist gearhead to determine which size you need. If you place an order online, a gearhead will be contacting you to determine what size you need. *Due to unprecedented demand in the global supply chain and the bike industry over the last 18 months, material weight and exact components are subject to change. We are working diligently to keep tech specs updated, and any adjustments will be minor. If you...