Peter Zijerveld (born 16 March 1955) is a Dutch former professional racing cyclist and triathlete.
He went to San Diego where he exchanged knowledge about cycling, learned how to swim (better) and bought an aerodynamic helmet.
Back in the Netherlands he put his helmet on in the first triathlon he rode.
Its package didn't have an instruction, so he put the helmet on backwards!
This biographical article related to Dutch cycling is a stub.