THE SCIENCE OF SPEED

The previous generation TCR introduced a more aerodynamic frameset using new truncated ellipse tubing in strategic areas. To engineer that advancement, we used Computational Fluid Dynamics (CFD) and wind-tunnel testing to create new airfoil sections that consistently lower drag coefficients at a wider range of yaw angles compared to traditional “teardrop” frameset shaping.

This new TCR takes the aerodynamic engineering another step forward. The most significant gains are achieved in the down tube, seat post and fork shaping. To ensure that it performs just as well in real-world conditions, we designed the aerodynamic flow around the down tube equipped with standard, 22-ounce water bottles. From there, we refined the entire system including frame, fork, cockpit and WheelSystem at the GST wind tunnel in Immenstaad, Germany.

To best simulate actual riding conditions, we used a dynamic mannequin to replicate real-world riding forces and conditions without the variables inherent to testing with human riders. While other brands typically use a static mannequin, our dynamic version more accurately reveals the aerodynamic effects of a rider while pedaling.

The testing protocol used a 24 mph (40 kph) wind speed in a temperature and humidity-controlled environment, with yaw angles ranging from -20 to +20 degrees. With the dynamic mannequin, spinning wheels and moving drivetrain, we were able to produce the most accurate aerodynamic analysis possible. This helped us sculpt the design of the new TCR frameset and fine-tune the overall system including the OverDrive Aero steerer tube and cockpit components.