Bicycle Derailleurs & Hangers

Derailleurs & Hangers when Cycling

Introduction

Derailleurs and hangers are essential components of a bicycle’s drivetrain. Derailleurs move the chain between gears, while hangers keep the derailleur in place. Proper maintenance of derailleurs and hangers can help improve the performance of a bike and prevent costly repairs.

Derailleurs

Derailleurs are devices that move the chain between gears on a bike. There are two types of derailleurs, front and rear. The front derailleur moves the chain between the chainrings, while the rear derailleur moves the chain between the cassette cogs.

How do I adjust my derailleur?

To adjust a derailleur, first, shift the bike into the smallest chainring in the front and the largest cog in the back. Turn the barrel adjuster on the derailleur until the jockey wheel lines up with the cog. Then, shift to the largest chainring in the front and the smallest cog in the back. Use the limit screws to adjust the derailleur until the jockey wheel lines up with the cog.

Why does my derailleur skip gears?

There are several reasons why a derailleur may skip gears, including a worn chain, worn cassette, or misaligned derailleur. To fix the issue, inspect the chain and cassette for wear, and adjust the derailleur alignment if necessary.

Hangers

Hangers are metal parts that attach the derailleur to the bike frame. Hangers can become damaged or bent, which can cause issues with shifting.

How do I know if my hanger is bent?

To determine if your hanger is bent, you can use a hanger alignment tool or take your bike to a professional bike shop. If the hanger is bent, it will need to be replaced or straightened.

Can I replace my own hanger?

Replacing a hanger can be a difficult task, as it requires removing the derailleur and aligning the new hanger. It is recommended to have a professional bike mechanic replace the hanger.

Conclusion

Proper maintenance of derailleurs and hangers is crucial for the performance and longevity of a bike. Regular inspections and adjustments can help prevent costly repairs and improve the overall riding experience. If you have any doubts about adjusting or replacing these components, it is best to seek the assistance of a professional bike mechanic.