I recently installed a sissy bar backrest with luggage rack on my 2011 Roadster. When I ordered it, I spoke to the parts guy who told me that the backrest was the same for all models and that it would fit any of them, roadster, classic or touring. I doubted him, knowing that the roadster has a wider rear tire.
He was in fact correct. The install went off without a hitch. Since I have been assured that at least the width of the rear fender is the same on all models, the quick release made for the rocket touring bike, should in theory, work with any of the rockets as well.
I haven't tried it out, but it seems logical.
Anyone prove otherwise?