So... let me get this straight: you're thinking of hanging up the whole bike, not just the frame; correct? If it's just the frame, it's not really an issue since it'll only weigh four or five pounds; most heavy wall hooks will handle that, if they're attached through the stud. I have a couple of frames I no longer ride (but which I'm very attached to) that I've hung up in my office as wall art.
If you're talking the whole bike, that's a different issue. Best bet would be to get a pair of standard wall-mount racks- the kind that support the frame levelly, by the TT- and mount them into two adjacent studs with some 3" grabbers.
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