Sergii Gordieiev, creator of Youtube channel “The Q,” has developed a working chainless bicycle using a series of 3D printed plastic gears. The system consists of one large gear connected to four smaller gears that transfer rotational motion from the pedals to the rear wheel.
The gear system requires precise alignment and measurements to function properly. If one gear slips out of position, the entire drivetrain fails to operate. Gordieiev painted the originally white plastic gears orange to make them more visible when riding the bicycle.
In his YouTube video, Gordieiev demonstrates the construction process, including building the frame modifications needed to mount the gear system. He first tested the gears on a wooden surface before installing them in the position typically occupied by a bicycle chain. The final small gear connects directly to the rear wheel’s hub, completing the mechanical linkage.
The project showcases how 3D printing can create custom bicycle components at home. Users can potentially replace damaged gears without visiting a bike shop, using standard 3D printing filaments. While currently only the gears are 3D printed, the approach could extend to other bicycle parts for further customization.
Source: designboom.com