About the VeloX

Each year, the team designs and builds a new VeloX that shaped around the athletes and incorporates the latest technological developments. By combining multiple engineering disciplines, the best result can be obtained.


To reach high speeds, aerodynamic drag is a huge difficulty. Therefore, the shell is redesigned every year to reduce the drag coefficient of the new VeloX. To simulate the air and review the air drag and separation, computational fluid dynamics software is used. Since this year a tandem will be built, the shape of the VeloX will change and the dimensions will increase. Accordingly, the challenge to reduce aerodynamic drag will be even greater.


The structure is the skeleton of the bike. It connects everything and holds everything in place. Because of the structure, the VeloX is stiff and secure, even at high speeds. This is very important, because it will keep our athletes safe.

In the past year, a lot of improvements were made. The overall structure has been slimmed down to create a lighter and faster VeloX. The front frame was made stronger and more stable using single beams.



In order to be able to cycle over 120 km/h, a large gear ratio is needed. At these speeds, the wheels will rotate up to 14 times per pedal stroke. To realise this, a large gear ratio is necessary. This is achieved by splitting up the transmission into two steps. By increasing the gear ratio of the second smaller transmission, a smaller chainring (44 teeth vs. 100 teeth) was achieved, which makes the drivetrain more efficient.

Human Machine Interface

The human machine interface functions as the eyes of the athletes. Because there are no windows in the VeloX, a camera is used that will show the road on two screens inside the VeloX. On these screens, the athletes also get live feedback on speed, power output and predicted performance. The data is also sent back to the coaches, who can talk to the athletes through an integrated headset system during the race. This communication with the coaches is essential for the performance of the athletes.


Each year the geometry of the VeloX is designed based on the selected athletes of that year. The goal is to make the combination of the athletes and the bike as good as possible. We make 3D scans of both athletes to achieve the perfect fit. The 3D scans show us how much space they need when pedalling, what their overall shape is and the shape of their faces. We use these scans for designing the seat of the bike and the steering wheel. The scan of their face is used for the respiratory system.