Chicago, Madrid, Rio de Janeiro and Tokyo, all hoping to stage the 2016 Olympics, have officially presented their bids to the International Olympic Committee.

The four cities' dossiers, weighing in at 600 pages, were handed in to the IOC headquarters in Lausanne before the deadline.

Chicago, Madrid, Rio and Tokyo were left in the running after Prague, Baku and Doha missed out in the first round of voting. A decision will be made on October 2 in Copenhagen.

Chicago's bid has been boosted by the high-profile support of President Obama, but the city is keen to stress that the backing of one man, albeit the most powerful man in the world, will not create complacency.

Bid spokesman Patrick Sandusky told the BBC: "Having one person elected to office won't sway a voter to vote for us.

"Some of his top advisers and closest friends are people that are on the board of directors for Chicago 2016 so we've had a great relationship with him.

"Him being elected showcases the city of Chicago and our support but it doesn't change our race as a bid city. "We still have to have a great plan and provide a great experience."

Tokyo are confident that their bid will not be affected by the global financial crisis. Hidetoshi Maki, deputy Director General of Tokyo's 2016 campaign, said $US3.8 billion ($A5.82 billion) has already been secured to cover the cost of developing new stadiums and infrastructure.

On top of that, Japanese Prime Minister Taro Aso, who competed in the shooting event at the 1976 Games in Montreal, has guaranteed the estimated $US3.1 billion ($A4.75 billion) required to cover the costs of running the event.

The Rio organisers said they have drawn up 100 copies of three 600-page volumes to make their case for the South American metropolis. Brazil has already secured the soccer World Cup in 2014 and the president of the Rio bid committee, Carlos Nuzman, believes this will count in their favour. The Games have never been held in South America.

"Several expenses included in our budget are on the budget of the World Cup," he told the BBC.

The Madrid 2016 organisers said they handed over their 600-page dossier to the IOC on Wednesday. The Spanish capital failed in its bid to host the 2012 Games, which went to London. The Spanish city of Barcelona hosted the 1992 Games.

Spanish IOC member Juan Antonio Samaranch junior admitted to the BBC: "I think President Obama, with his close connections to Chicago, will definitely be a factor.

"But this is not about politics, it's about producing the best bid and we shall see what the Obama administration puts on the table."

The IOC Evaluation Commission, chaired by IOC Executive Board Member Nawal El Moutawakel will now analyse the Candidature Files and make site inspections as follows: Chicago: 4 to 7 April, Tokyo: 16 to 19 April, Rio de Janeiro: 29 April to 2 May and Madrid: 5 to 8 May (random draw).

The Commission will then prepare a report that will be published and submitted to IOC members no later than one month before the election of the Host City on 2 October during the 121st IOC Session in Copenhagen.

Betting markets around the world have Chicago as favourite followed by Rio, Tokyo and Madrid.

The main hurdle for Madrid, who led after the third round of voting for the 2012 Games before eventually losing to London is speculation that the IOC will look to move the Games to a different continent, although this is not official IOC policy. 

AFP and AOC