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The 10th generation TCR range includes new frame designs and construction techniques to create the fastest TCR bikes ever. Learn more about our testing methodology and see the results for weight, stiffness, efficiency and aerodynamics.


While seemingly objective, frameset weight can be a highly subjective variable. It all depends on what is considered a frameset. Giant defines a frameset as follows:

  • Size medium, painted/decaled production frame
  • Production fork (cut to 20mm of spacer height)
  • Headset/expander/top cap
  • Seatpost (ISP or seatpost included with frameset)
  • Seat clamp/ISP clamp
  • Front and rear derailleur hanger/clamps
  • All production hardware (water bottle bolts, etc.)


Frame765 g690 g800 g800 g
Fork330 g330 g330 g382 g
Frame Paint50 g56 g79 g68 g
Fork Paint10 g10 g16 g14 g
Seatpost/ISP Clamp103.9 g107 g215.9 g215.9 g
Front Derailleur Hanger14.5 g14.5 g14.5 g14.5 g
Rear Derailleur Hanger13.4 g13.4 g13.4 g13.4 g
Expander35.7 g41.4 g41.4 g23.85 g
Top Cap6.6 g5.5 g6 g8.21 g
Headset and spacers67.93 g90.8 g93.8 g87.4 g
Total Weight1397.03 g1358.6 g (38.43 g less)1610 g (251.4 g more)1627.26 g (268.66 g more)


Stiffness was assessed using the protocols established by industry standards with size medium framesets. Giant tested both steering (lateral) and pedaling stiffness with its corresponding fork in place. This provides a far more accurate measure of how a bicycle will perform in real-world conditions and helps ensure that our testing procedures translate into performance gains that can be felt on the road.

Our testing determined how much the complete frameset flexed torsionally under load. Each frame was locked at the rear dropouts with lateral force applied to the fork. More frame stiffness means better cornering and response to rider input on the road. Even though it’s significantly lighter, the all-new TCR Advanced SL provides .53 percent greater transmission stiffness over the previous generation.

Increased frame stiffness means better power transmission, enabling the rider to reach and maintain higher speeds with less effort. The combination of lower weight and higher stiffness adds up to unrivaled overall efficiency.


ComponentStiffness Type2021 TCR Advanced SLNew TCR Advanced SLNew TCR Advanced ProNew TCR Advanced
ForkLateral (N/mm)76.877.677.674
FramePedaling (N/mm)70.967364.262
Transmission Stiffness*Transmission (N/mm)149.8150.6141.8136
Difference in Transmission N/mm0.53% improvement-5.84% less-9.69% less

*(lateral fork and frame pedaling)


By improving stiffness and decreasing weight, the new TCR range significantly boosts its overall efficiency (stiffness-to-weight) ratio.


Feature2021 TCR Advanced SLNew TCR Advanced SLNew TCR Advanced ProNew TCR Advanced
Transmission stiffness (lateral fork and frame pedaling (N/mm)149.8150.6141.8136
Frameset weight (complete and painted) (kg)1.391.351.611.62
Stiffness-to-weight ratio107.23110.8588.0783.58
Total3.38% improvement-20.55% less-24.60% less

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.


2021 TCR Advanced SLNew TCR Advanced SLDifference (Watts)Feature
252.1249.822.28 W improvementAverage 2021 TCR Advanced SL frameset to new TCR Advanced SL frameset drag @40kph with two bottles and cages from -20 to +20 degree yaw angles (watts)
254.01249.824.19 W improvementAverage 2021 TCR Advanced SL 0 complete bike to new TCR Advanced SL 0 complete bike drag @40kph with two bottles and cages from -20 to +20 degree yaw angles (watts)