shimano

The length of the derailleur cage is often associated with the range of tooth sizes that it can accommodate on the rear cassette. Different cage lengths are designed to handle specific ranges of tooth sizes on the cassette. Here’s a general guideline for the cage length and the range of tooth sizes on the rear cassette: It’s important to note that these are general guidelines, and the specific compatibility may vary depending on the derailleur model and brand. Always check the manufacturer’s specifications and recommendations for your particular derailleur to ensure it is compatible with your cassette and drivetrain setup. Choosing the right derailleur cage length is crucial for proper shifting performance and to prevent issues like excessive chain slack or tension. The specific length of a short cage derailleur can vary between manufacturers and models, but generally speaking, a short cage derailleur typically has a cage length of around 60-70mm (2.36-2.75 inches). Medium cage derailleur typically has a cage length of around 70-90mm (2.75-3.54 inches). Long cage derailleur typically has a cage length of around 90-110mm (3.54-4.33 inches). This length is measured from the center of the jockey wheel (the small pulley wheel) to the center of the mounting bolt that attaches the derailleur to the bike frame. Short cage Medium cage Long cage