What Is a Cassette In a Road Bike

Last Updated on July 27, 2020

This guide has been written by cycling review expert Alex Bristol

Last Updated on July 27, 2020


Many a time people fail to understand “what is a cassette in a road bike?”. Therefore, their state of confusion remains constant. Even though people are fully aware of what or how a road bike works. Therefore, people need a bit more information regarding this.

Before you try to fix the cassette (install a new one), you need to know the basics of it. When asked, a lot people did not know how to define a cassette. Here you can find more information.  

What is a cassette?

A road bike cassette is seen to be a cluster of sprockets. The rear hub of your bike is the place where it is located. The free hub body holds the cassette tightly in place with the help of a threaded cassette lock ring.

Typically, a cassette consists of sprockets ranging from eleven, twelve or thirteen. However, the most modern and technologically updated cassettes have used the largest sprockets between 21 to 32 teeth.  

A lot of road bikes come with a range of 12-15 cassettes. These are considered to be the ideal number of cassettes with pairing to the standard chain set.

However, there are exceptions when it comes to choosing the place where you want to ride your bike. While riding on a hill, a cassette that has a larger sprocket number i.e. 27 or more teeth, may be the best option. This will help you spin along.

The purpose of a cassette:

The cassettes present on a road bike bring in options for you. These options consist of gearing which run on the chain. In order to achieve optimal efficient results, these gear options let you alter your pedaling cadence i.e. the revolutions per minute.

If you are running on the chain with the sprockets with the most teeth, then you will get an easier gear. The torque is reduced in order to keep the wheel from turning back.

Where there are a lower number of teeth present on your chain, the torque maximizes. This means that the racer might not have to constantly pedal but put in more force. Without spinning out, lesser sprockets mean adding more power through the drive train.  

When there are good options of gears on cassettes on your road bike, it will allow you to choose things on your own. Meaning it is the torque of optimal level vs the speed of the pedal. The results become effective as you put enough effort into the wheels.


There are many options available in the market for you to choose from. The options help you in deciding and choosing the perfect thing for your ride. If you choose a longer cage rear, with larger teeth, that will be more beneficial as compared to the smaller cages with smaller teeth number. The chain also slacks with smaller sprockets.

Be it on the road, the hills, or mountains, the cassettes are something that brings a lot of comfort in your ride.

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Related Post: Best Gear Road Bike Cassette [Review]

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