Pentagon

A pentagon as a wheel.

The Pentagon idea: The axle is always at the same distance from the  driving surface. With a diameter of 30 centimetres, the pentagonal wheel runs as  smoothly as a one-metre circular wheel. The gearbox is in the  

crankset. Ceramic journal bearings. Material: bio composite. Other  applications for pentagonal wheels: prams, scooters, walkers,  tractors, earthmovers, lawnmowers...