If you've ever wondered why bikes have so many gears, you're not alone. It can seem like a lot, especially when compared to the simplicity of a single-speed bike. But those extra gears come in handy, and each one serves a specific purpose.
Here's a quick rundown of why you need 21 gears on a bike:
1. To go faster: The more gears your bike has, the higher top speed you'll be able to achieve. If you're looking to go fast, 21 speeds is the way to go.
2. To go uphill: Bikes with more gears are better equipped to handle hills and inclines. That's because you'll be able to shift into a lower gear which will make pedaling easier.
3. To go downhill: Conversely, bikes with more gears are also better for going downhill since you'll be able to shift into a higher gear and pedal faster.
4. To save energy: Shifting into the proper gear can make pedaling easier and help you conserve energy - both of which are important if you're planning on biking long distances.
5. To improve control: Having more gears gives you finer control over your speed and makes it easier to adjust your pace as needed - whether that means speeding up or slowing down depending on the terrain or traffic conditions