the klickfix thing above is a reaction to the brompton frame, for bikes that only have a klickfix headtube plate instead of a brompton front block[/QUOTE]

The beauty of the Rixen Kaul rack is that it can be used on any bike (front or rear) by fitting the KlickFix block (handlebar mount, seat tube bracket or Caddy bracket). I haven't tried it yet but if it is of the usual R/K quality it should be a good bit of kit.