An adapter to enable safe transport of bikes with carbon frames. Distributes fixation pressure over a large surface area to minimize risk of any frame damage. Fits all types of frame geometries and is easily adjustable with no loose parts. The adapter has a soft TPE rubber liner to avoid scratching the bike frame. Only for use with Thule bike racks with a torque limiter knob such as Thule ProRide and Thule EasyFold.