växelfästena

Växelfästena refers to the various methods and components used to attach a bicycle's rear derailleur, also known as the rear gear changer, to the bicycle frame. The primary function of växelfästena is to securely hold the derailleur in place while allowing it to move precisely to shift the chain between different cogs on the rear cassette.

Historically, the most common form of växelfästena was the claw or hanger, a separate component bolted to the frame's dropout. This claw would then receive the derailleur's mounting bolt. While offering some adjustability and ease of replacement if damaged, claw-style hangers could sometimes be a point of weakness or flex. Modern bicycle frames predominantly utilize an integrated derailleur hanger, which is a designed-in part of the frame itself, often made of aluminum or a more robust alloy. This integrated design aims to improve stiffness, alignment, and often offers a sacrificial element to protect the frame in case of a significant impact.

Another significant type of växelfästena is direct-mount. In this system, the derailleur mounts directly to a specific point on the frame, eliminating the need for a separate hanger. This design is often found on higher-end bicycles and can offer increased rigidity and potentially simpler adjustment. The specific type of växelfästena employed is often dictated by the frame material, intended use, and the desired level of performance of the bicycle. Understanding the type of växelfästena is crucial for proper derailleur installation, adjustment, and maintenance.