How do bike gears operate?

Question: i've just got my new bike and I;m not sure how to shift gears when going up and down hills. thanks a lot for your help

Answer: It's all about the size difference between two gears. You've got 2 or 3 big gears up front (called the chain rings) and a bunch of little gears in the back. Your shifters let you select which gears you want by moving the chain from one gear to another. Little gears up front combined with big gears in the back have a lot of power but aren't very fast. This is good for going up hills. Big gears up front combined with little gears in the back have a lot of speed but aren't very powerful. This is good for going downhill. Put everything in the middle as a starting place for riding on flat ground. Select different gears in the back to get more power or speed as you need it, depending on your terrain. When you run out of gears in the back, change the gears in the front. This is very much simplified, but should get you started.

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