I am considering using a bike that is currently used as fixed gear, that has 130mm rear spacing with track dropouts.
As far as I can see, the problem solvers derailleur hanger could be an option.
In the description they precise "If you want to use this tensioner with a quick release hub, check out the Surly Bikes Tuggnut QR adaptor" ; however, this doesn't seem to be available anywhere in Europe. Would the derailleur hanger work without these adapters?
EDIT: alternatively, seems like SunXCD does one also, adaptors are not mentioned but I can't see how it is different from the problem solver one