World's Fastest BICYCLE


Latin velox m, f, n (genitive velocis); third declension
– Swift, quick fleet rapid, speedy

Today know as highly advanced aerodynamic bicycle. 


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. This year we will built a tandem as seen in the animation in the middle. The air drag of this VeloX is the same as the air drag of a dolphin!


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. This is achieved by splitting up the transmission into two steps. By increasing the gear ratio of the second smaller transmission a smaller chainring is achieved. 44 teeth vs 100 teeth! This 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. They can talk to the athletes through an integrated headset system during the race.


The structure is the skeleton of the bike. It connects everything and holds averything in pplase. The structure of the VeloX is stiff and therefore secure. Even at high speeds! This is very important because it will keep our athletes safe.
In the past year a lot of improvements have been made. The overall structure has been slimmed down to create a lighter and faster VeloX. The front frame is made stronger and more stabel using single beams!


Each year the geometry of the VeloX is designed, based on the athletes who are selected. The goal is to create a bicycle that fits perfectly around our athletes. To achieve this perfect fit we make 3D scans of our atlethes. 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 theze scans for designing the seat of the bicycle and the steering wheel. The scan of theri face is used for the repiratory system.

Take a peek inside our world


In 2009 a new world record was broken by the canadian Sam Wittingham at Battle Mountain: 133 km/h in a human powered vehicle. This record was achieved by riding an aerodynamic recumbent bicylce. It gathered attention from people all over the world. when some students from the Delft University of Technology heard about this they were impressed and intrigued. They were also inspired!. They thought about how much faster they could go if they would build an even more technically advanced bicycle. The students made a decision. They wanted to break the world record within 3 years time. Thus the Human Power Team was borne. Made out of carbon fiber frame and a precisly engineered aerodynamic shell, the first VeloX was borne.