Johannes Marinus Plantaz (December 3, 1930 in Geldrop

Geldrop

Geldrop is a town in the Dutch province of North Brabant. It is located in the municipality of Geldrop-Mierlo.Geldrop was a separate municipality until 2004, when it merged with Mierlo...

, Noord-Brabant – February 10, 1974 in Eindhoven, Noord-Brabant) was a road bicycle

Road bicycle racing

Road bicycle racing is a bicycle racing sport held on roads, using racing bicycles. The term "road racing" is usually applied to events where competing riders start simultaneously with the winner being the first to the line at the end of the course .Historically, the most...

 and track cyclist from the Netherlands

Netherlands

The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

, who represented his native country at the 1952 Summer Olympics

1952 Summer Olympics

The 1952 Summer Olympics, officially known as the Games of the XV Olympiad, were an international multi-sport event held in Helsinki, Finland in 1952. Helsinki had been earlier given the 1940 Summer Olympics, which were cancelled due to World War II...

 in Helsinki, Finland.

There he was eliminated in the quarterfinals of the men's 4.000m team pursuit, alongside Adrie Voorting

Adrie Voorting

Adrianus Voorting was a road bicycle and track cyclist from the Netherlands, who represented his native country at the 1952 Summer Olympics in Helsinki, Finland...

, Daan de Groot

Daan de Groot

Daniël de Groot was a road bicycle and track cyclist from the Netherlands, who represented his native country at the 1952 Summer Olympics in Helsinki, Finland....

 and Jules Maenen

Jules Maenen

Julius Hermanus Maenen was a road bicycle and track cyclist from the Netherlands, who represented his native country at the 1952 Summer Olympics in Helsinki, Finland....

. In the men's individual road Plantaz ended up in 22nd place.