This Thule adapter is required to enable the safe transport of bikes with carbon frames. The fixation pressure is distributed over a large surface area to minimize risk of frame damages. It 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. Suitable for Thule ProRide 598, Thule EasyFold XT 933 & 934, Thule VeloSpace XT 938 & 939. Only to be used with Thule bike carriers with a torque limiter knob.