18 gears

If you’re in the market for a new bike, you may be wondering what the difference is between an 18 speed bike and a 21 speed bike. Here’s a quick rundown of the main differences between these two types of bikes.

An 18 speed bike typically has three gears in the front and six gears in the rear. This gives you a total of 18 gears to choose from, which can be helpful if you’re riding on varied terrain.

A 21 speed bike, on the other hand, typically has two gears in the front and seven gears in the rear. This gives you a total of 21 gears to choose from, which can be helpful if you’re looking for a wider range of gears for climbing hills or riding on flat terrain.

So, which is right for you? If you’re mostly riding on flat terrain, an 18 speed bike may be all you need. However, if you’re planning on doing any serious climbing, a 21 speed bike may be a better option.