The bike shop itself doesn't really have much in it. It is but one of several locations they ran the bike business out of, and the only building still standing in Dayton that they operated in. One of the buildings they worked out of, perhaps the last one, I'm not sure, was re located to Greenfield Village in Dearborn by Henry Ford. I have seen that one as well.
The Dayton shop is located next door to the aviation museum, and the tour is conducted by the museum staff.