This how-to video demonstrates the process of switching gears on a bicycle. Depending on the number of chains and hubs, your bike will have a varying number of gears. You should be aware of the terrain and make sure you are in the appropriate gear. Don't change gears under power. Know how and when to change gears to make the bike ride smoother and more enjoyable. Watch this video cycling tutorial and learn how to shift gears on a bicycle.