Don’t call it an aero road bike, so says Cannondale. Instead, call it “the fastest road bike in the world”. Why is that? It’s because Cannondale claims the 2019 Cannondale SystemSix Hi-MOD Ultegra Di2 is the fastest road bike in the world. A bike that took three years to develop, the Cannondale SystemSix road bike offers the very best in integrated design, aerodynamic implementation, and outright speed in one package.
Starting at the core of the bike, the frame, fork, seatpost, bar, stem and wheels were designed together as a holistic system to improve speed, comfort, and stiffness where it matters most. They done it with through careful CFD and wind tunnel testing, which leads to an angular bike with truncated airfoils in every tube. The fork, designed to fit a 30mm effective tire with room to spare, flows neatly into the headtube and downtube. The downtube where the fork meets forces airflow upward. The downtube features two different water bottle mounts for the most aero water bottle position possible. Similarly, the headtube offers an aero design that creates an opening for brake cable and Di2 wiring. Sleek, integrated, and well-designed routing defines the SystemSix.
Cannondale didn’t just stop at the frame to make the bike as efficient as possible; they looked at every point possible. Disc brake-only design allows for greater optimization of the rest of the bike. Cannondale worked with HED wheels for their HollowGram KNOT 64 carbon wheels. At 64mm deep front and rear with a 21mm internal width, it offers potential for lower inflation pressures, greater comfort, and improved grip. The 32mm external width optimizes aerodynamics for a 26mm effective-width tire tire. Further, Cannondale developed their KNOT SystemBar, an integrated aero bar with eight degrees of pitch adjustment, an aero flare to the drop bar, a removable cable cover for improved aero and serviceability, and aero spacers that open to adjust stem height without needing to pull cables.
Other neat features include Speed Release Thru-Axles, an included Power2Max crank-based power meter, and a built-in Garmin mount.
The 2019 Cannondale SystemSix Hi-MOD Ultegra Di2 aero road bike uses Cannondale’s BallisTec Hi-MOD carbon frame and fork for improved stiffness and weight, and pairs it to a Shimano Ultegra Di2 drivetrain. A HollowGram KNOT 64 carbon wheels with DT Swiss internals pairs to a Cannondale HollowGram SiSL2 crankset with a Power2Max power meter, Cannondale KNOT SystemBar and stem, and KNOT carbon seatpost. A Prologo Dimension NACK saddle finishes the build. The SystemSix Hi-MOD Ultegra Di2 is available in seven sizes (47-62 cm), in their Black Pearl with Sage Gray and Volt – Gloss colorway.
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