There are the pedals that make it move and the brakes that stop the bike. A mountain bike is special because it has gears. The gers help it go up hill. There is a chain between the pedals and back tyre. The chain goes around the pedal to move the back tyre so the whole bike will move. The chain is also hooked to this spikey thing on the back tyre. Your bike will work when your feet move the pedals. The brakes will work when you pull a lever. There are front brakes and back brakes. The handlebars are most important because thay steer the bike.
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