Gear Cranks
A gear crank is a device that generates rotary motion by reciprocating motion. On a bicycle, the integral part that connects the crankshaft and the pedal shaft is called the crank, and when you step on it with your foot, the crankshaft rotates and the bicycle runs. It is important to choose the proper crank length according to your height (leg length), and it is an indispensable item for faster speed, smooth and light riding. There are aluminum alloy and steel, and it is a good idea to choose one considering the purpose and usage situation.
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