Rant Gravitron Detangler Kit Description: The Rant Gravitron Detangler Kit is here to help make your multi-bar and multi-whip combo dreams come true. Spinning the bars is tough, but gets tougher when you have to unwind your brake cable. Rant has a solution! The Gravitron Detangler. Includes upper and lower Y-cables and all the hardware required for installation on a standard headtube frame. Note: For frames with integrated headtubes, a set of removable detangler tabs are required (sold separately) and the headtube must be drilled to accept bolt on tabs. Specifications: Upper Cable Length: 420mm Detangler Inner Diameter: 46mm