1964 BMX?

Ethan showed up wearing a new shirt this morning. I have a couple issues with it though. In 1964 kids might have been altering there Stingrays and mimicking the riding of Motocross but I doubt it had been labeled BMX yet. This sport would have been in it”s infancy at most and I don”t believe there would have been any sanctioned events or any All Stars. Also the bikes on the shirt appear to have rear pegs.

Otherwise cool shirt.