Originally Posted by AEO

if you want to use a hollowtech II double with the FD clamp from thor, buy a triple hollowtech II crankset.
The triple hollowtech II crankset sits the chainrings out further and you won't run into problems with the FD bottoming out on the frame. You, of course, can't use the granny ring, but you'll get a properly functioning double.

I've installed an ultegra triple to my dahon, and it works perfectly as a double with the FD adaptor from thor. A double fits, but the rings sit too inward for proper actuation.