800 Series OCLV Carbon is the lightest laminate we’ve ever made, and it makes Madone faster on any terrain, in any conditions;The Shimano Dura-Ace Di2 electronic drivetrain delivers lightning fast precision shifting;Adjustable Top Tube IsoSpeed lets you adjust compliance to your preference, and it's damped with an elastomer so it rebounds in a smooth, controlled, stable motion;A separate bar and stem with an aero carbon faceplate gives you great adjustability without compromising on aerodynamics;