![Stable Bike with Triangular Wheels](https://hight3ch.com/wp-content/uploads/2016/11/stable-bike-with-triangular-whee.jpg)
Note that, while the wheels appear to bounce, the frame and rider don’t bounce a millimeter. The wheels are in the shape of a Reuleaux triangle – a curve of constant width. The frame sits on top of the wheels, supported by rollers within the fenders.