Derailleur gears

Have you ever ridden a bike? You know how when you pedal, the bike moves forward? Well, imagine you're riding up a really steep hill. It's hard to pedal, right? That's where derailleur gears come in.

Gears are like different speeds on your bike. Just like how you can run fast or slow, you can pedal fast or slow. But when you're going up a hill, you need more power. So, you switch to a harder gear, which means it's harder to pedal, but with each pedal, your bike can move further.

Derailleur gears are a special type of gears that let you switch from one gear to another. They work by using a little metal arm that moves the chain from one gear to another. This way, you can change how hard it is to pedal as you ride your bike.

So, next time you're riding your bike and you need a bit of extra power, switch to a harder gear with your derailleur gears. You'll be riding up hills like a pro in no time!