A device utilized in bicycle maintenance, this tool supports the chain when the rear wheel is removed. It prevents the chain from retracting into the frame and potentially causing damage or making reinstallation difficult. By maintaining chain tension and position, it simplifies cleaning, lubrication, and other drivetrain work.
The employment of such a device offers several advantages. It allows for easier cleaning of the chain and rear triangle of the frame. Additionally, it protects the frame from scratches and paint damage that can occur from a loose chain. Historically, makeshift methods, such as using zip ties or string, were employed. This specialized tool offers a more secure and convenient solution.