Cassettes and sprockets for road bikes

A bicycle cassette is a set of gears that play a major role in determining the gear ratios and overall performance of your bike. These components are responsible for smooth and efficient gear shifting, allowing you to adapt to different climbs and maintain an optimal cadence.
Gear range is an important factor when choosing a cassette and sprocket for your road bike. It determines how big the difference is between the smallest and largest sprockets.

The large gear range is suitable for riding in a variety of terrains and conditions. For example, if you ride both road bikes and mountain roads, you'll need a cassette with a large gear range so you can easily climb hills while maintaining speed on the flat.
The small gear range is suitable for riding on flat roads. For example, if you're racing, you'll need a cassette with a small gear range so you can easily reach high speeds.

Cassettes and sprockets need to be replaced when they wear out. Wear is indicated by the sprockets becoming jagged and the chain having difficulty moving on them. Replacing a cassette is not difficult, but you will need specific tools such as a cassette puller and a chain whip.

Check out our video "What's the difference between a cassette and a freewheel?"