Australian Tube Products (ATP) Stem Cap

Australian Tube Products (ATP) was a company that made handlebars and stems for bicycles. In the 1950’s, they produced the 'The Ray Gun' stem, which was constructed from a few steel tubes which were brazed together, and a plastic cap which was inserted into the rear of the stem. This prevented users from injuring themselves and to keep water and contaminants out of the stem. Over the past 60 years, the plastic cap was either lost or deteriorated from UV exposure.