Bought a bike rack on ebay yesterday for the obligatory trip to Centre Parcs. Just having a look today and it seems the clamps/cradles that the top tube of the frame is supposed to sit in are not even close to being wide enough to accommodate the frames of my Caadx. They seem to be more suited to an 80s thin cylindrical type frame rather than modern tube shapes and widths, although the rack itself is virtually brand new. Am I doing it wrong, or is this a common issue? If so, what solutions are used to overcome the problem?