An aerodynamically honed stem with adjustable length and angle to optimize your position. Linking handlebar to fork, the stem was developed with Team Dimension Data for the refined ride response and control needed in a critical area of the bike. This stem...
- SKU: NV/STEM/ROAD/AERO/100
What It Is
An aerodynamically honed stem with adjustable length and angle to optimize your position. Linking handlebar to fork, the stem was developed with Team Dimension Data for the refined ride response and control needed in a critical area of the bike. This stem is intended for negative drop only and cannot be flipped or reversed in a positive rise.
Why We Made It
The rider makes up 80-90% of total aero drag, so refining your position can produce some of the biggest gains of all. Further, the shape of the stem, plus the ability to eliminate headset spacers, allows for cleaner airflow at the front of the bike, producing valuable drag savings. Created in conjunction with Team Dimension Data, the stem delivers the confident and responsive ride feel desired by the best riders in the world.
Who’s It For
Racers, triathletes, and performance-focused riders looking to optimize their position and improve overall aerodynamics, while maintaining the stiffness and comfort needed for speed.
Our approach to aerodynamics has always been to find the best solution for the complete system of the bike and rider, because we understand that there is more to aerodynamic performance than a low drag figure in the wind tunnel. This approach can be seen in our wheels, where we target stability alongside drag reduction to make you as fast as possible on the road in real conditions, where it counts. It can also be seen in our pioneering SES Aero Road Handlebar, which delivers a speed boost through rider positioning as well as its shape. The SES Aero Road Stem is the natural partner to that handlebar, using the same parallel design considerations. First, we developed a shape with reduced frontal area, smoother airflow, and lower drag. Next, we designed in beautifully simple methods for adjusting the angle and fine tuning the length. The result is a lightweight stem that fits any of our handlebars and makes you faster.
- AERODYNAMIC SHAPING
The SES Aero Road Stem followed the same process of aerodynamic development as our SES wheels, with initial concept analysis in Computational Fluid Dynamics by aerodynamicist Simon Smart, of Smart Aero Technology. Prototypes were verified first in the wind tunnel by Simon, where he confirmed a valuable drag reduction, and then on the road with Team Dimension Data for Qhubeka.
From working with Team Dimension Data for Qhubeka, we quickly learned that even pro riders need a wide variety of positions from their stems. With their input, and our own function and performance-first design expertise, we crafted a stem with two positions each for length and angle using steerer tube shims. With the first spacer, a -7 or -17 angle is achieved, while a -12 angle with +/-2.5mm in length is achieved with the second spacer. Even with two-way adjustability and an aero profile, we were able to keep the weight down to a mere 175g (110mm length), including the adjustment spacer and top-cap, in a design that works with any standard steerer tube and any of our road handlebars.
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