Rear Derailleur - Bike Chain Diagram

Apr 27, 2023

If you are into cycling, understanding the components of your bike is essential. One crucial element of a bike is the rear derailleur. In this detailed guide brought to you by Shout It Marketing, we will explore the bike chain derailleur diagram and delve into the intricacies of how a rear derailleur works.

What is a Rear Derailleur?

A rear derailleur is a key part of a bike's drivetrain system. It is responsible for moving the bike chain across the rear cassette, allowing cyclists to shift gears smoothly and efficiently. Understanding the chain derailleur diagram can help you troubleshoot issues and perform maintenance on your bike.

Components of a Rear Derailleur

The rear derailleur comprises various components that work together to facilitate gear changes. These include:

  • Jockey Wheels: Small wheels that guide the chain as it moves across the cassette.
  • Cage: The structure that holds the jockey wheels and guides the chain.
  • Mounting Bolt: Attaches the derailleur to the bike frame.
  • Limit Screws: Control the range of motion of the derailleur.
  • Spring Tension Adjustment: Sets the tension of the derailleur spring for optimal performance.

Understanding the Chain Derailleur Diagram

The chain derailleur diagram illustrates how the chain interacts with the rear derailleur's components during gear changes. By familiarizing yourself with the diagram, you can troubleshoot issues such as chain skipping, noisy shifting, or chain slippage.

Performing Maintenance on Your Rear Derailleur

Regular maintenance of your rear derailleur is crucial for smooth gear shifting and overall performance. Here are some tips to keep your derailleur in top condition:

  1. Clean the derailleur and jockey wheels regularly to prevent dirt buildup.
  2. Inspect the limit screws and adjust them if necessary to ensure proper shifting.
  3. Check the spring tension and adjust it for optimal performance.
  4. Lubricate moving parts to reduce friction and enhance shifting efficiency.
  5. Replace worn jockey wheels or damaged components to maintain smooth operation.


In conclusion, understanding the rear derailleur and chain derailleur diagram is essential for any cyclist looking to maintain their bike's performance. By learning about the components and mechanics of the derailleur, you can troubleshoot issues, perform maintenance, and ensure smooth gear changes during your rides.

Stay tuned for more informative content on cycling, digital marketing, and other topics from Shout It Marketing's expert team.