"Next year I'll be stronger. I'll have a bit more self belief and confidence.
"It will be very difficult to challenge (Tour winner) Alberto Contador. He is an amazing rider but I'll go in the best possible condition and see what happens.
"I won't go in to finish third. I set off to win the race."
Wiggins also confirmed his intention to defend his Olympic 4,000m individual pursuit title for a second time after winning in Athens in 2004 and Beijing last year. He also won the team pursuit in China.
"The support from the Brits will be amazing as it always is at the Olympics," he said.
"Athens was incredible so I can't imagine what London will be like.
"I want to defend my pursuit titles in London but it is quite far away to think about.
"This year still hasn't sunk in but London is at the back of my mind and I'd love to be going for number three in the individual.
"It will be a nice way to end my career if I do end it there, which I probably will."
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