neon chain bicycle link bike motorcycle two crankset cogwheel sprocket crank length with gear for bicycle cassette system

neon chain bicycle bike crankset cogwheel crank sprocket length cog chainring motorcycle chainwheel element equipment vehicle set transportation component mechanical industrial connection gear service steel iron shape cassette system part transmission disk pedal chainset teeth tooth detail gearwheels sport silhouette spoke shift cycling gearshift contour outline line red color vector