The influx of aero bikes in the pro peloton comes down to two reasons. First, the sport's governing body, the UCI, places a minimum weight limit that bikes must adhere to, and instead of mechanics adding dead weight to make a bike compliant, bike manufacturers are finding ways to add some functional weight to the bike with tangible benefits, so aero tubes that lower drag makes total sense. The other is because the speed of sprints, break always, and the chase to bring back those breakaways, are so high, the pros are looking for ways to make their jobs easier and science tells us that aero drag accounts for as much as 90 percent of a rider's overall resistance. Less drag equals more speed and the benefit happens at lower speeds than you might think as well as on single-digit gradients. So if you're looking for an advantage in a day-long breakaway, while sprinting, or want a do it all machine for the weekend omnium, we'd suggest looking at an aero rig if you are new bike shopping. And if you want to be up to speed on the newest tech such as electronic shifting and disc brakes, look no further than the S3 Disc Ultegra Di2 R8070 Complete Bike.Cervelo honed the S3's aerodynamics after spending countless hours in the wind tunnel testing and refining designs. This particular disc model features full internal cable routing thanks to a new bar and stem that hides the brake and shift housing from the wind for improved aerodynamics. Additionally, the new frame profiles work together to reduce drag so you simply go faster. Cervelo calls this True Aero which combines these specific tube shapes, sizes, and design features to improve aerodynamic flow across the bike.The most aero bike available is meaningless if it's a wet noodle though, so thankfully Cervelo worked hard to increase the stiffness at the bottom bracket shell ensuring efficient power transfer and that every watt goes straight to the rear wheel. Just like every other Cervelo, the S3 uses its BBright shell which ...