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Cervélo invented the aero road frame, and continues to lead the category. Aero road frames are the most difficult frames to design, as they have to be everything in one: aero, light, stiff, comfortable. Cervélo has worked to optimize this balance between the various requirements since its inception 13 years ago.

For the Cervelo S3, the engineers at vroomen.white.design used the R3 seatstay technology, rotated the stays 90 degrees and gave them a proper Cervélo aero shape. This reduces the weight, increases the vertical compliance and improves the aerodynamics. Sounds simple, but the structural design is extremely complex, which is why only Cervélo has such stays. The chainstays were also redesigned to optimize aerodynamics. Finally, the cable routing system (ICS2) is the first to have cable entries through the top of the toptube without sacrificing shifting performance.


Outstanding aerodynamics – Airfoil shapes designed by Cervélo for bicycle speeds, not for airplanes. Features that work, no aero gimmicks that work on a TT bike but not on a road bike. 

Light, but efficient – Sub-1000g yet with an exclusive Cervélo lay-up design to create class-leading stiffness in the bottom bracket (for efficient power transfer) and in torsion (for excellent handling) 

Vertically compliant – Seatstays as thin as on the R3, but rotated 90 degrees and reshaped for aerodynamics. Light, comfortable and aero, the best in aero road bike engineering. 

Perfect balance – Aero, light, stiff and comfortable, the S3 works. Several companies make aero road bikes, but only the Cervélo aero road bikes were used extensively at the hilly Olympic road race, a testament to their balanced approach. 

Aero sloping toptube – Horizontal airfoil cross section for the toptube with 1:15 thickness-to-chord ratio make even the toptube an aero asset. 

Stealth aero headtube – Hourglass shape on the sides allow for aero cross section without the need for a nose on the headtube. 

Oversized bottom bracket area – Large diameter and smooth, optimized shapes increase bottom bracket stiffness for excellent power transfer from pedal to rear wheel. 

ICS2 Internal Cable Stops – Entry through the toptube & Internal Cable Stops on the downtube combine the most aero cable routing with the lowest friction and lowest weight solution (no excess housing inside the frame). 

Flexible geometry – The 2-position seatpost (optional) allows you to put your saddle in a 76 degree seattube angle position, ideal for the occasional triathlon. As the S3 is more aero than most of the full TT bikes on the market, this offers great triathlon performance without the need for a second bike. Of course, for regular triathlon use, a triathlon bike is still a better choice, thanks to the 78 degree seattube angle and dedicated triathlon geometry.


Monocoque TrueAero Carbon
3T Funda Team
Cane Creek
Cervélo aero carbon
Braze-On Required
68mm - English
950 grams (appr.)
*Specifications are subject to change.

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