Factory Supply Mountain Bike Crank Chainwheel with Plastic Chainguard

The working principle of its single-stage flywheel: when the pedal is stepped forward, the chain drives the flywheel to rotate forward. At this time, the inner teeth of the flywheel are combined with the kilo. The rotating force of the flywheel is transmitted to the core through the kilo. The core drives the rear axle and rear wheel to rotate, and the bicycle moves forward.

The chain, also known as vehicle chain and roller chain, is installed on the coupling wheel and flywheel. Its function is to transfer the pedal force from the crank and sprocket to the flywheel and rear wheel to drive the bicycle forward.