During World War II , petrol was strictly rationed , making cycling the dominant form of transportation in Copenhagen .
The first race was held in 1934 in the original Forum Copenhagen and its popularity peaked in the 1960s .
During World War II , petrol was strictly rationed , making cycling the dominant form of transportation in Forum Copenhagen .
The first race was held in 1934 in the original Forum Copenhagen and its popularity peaked in the 1960s .