Chris Boardman believes Bradley Wiggins should prioritise the 2012 Tour de France ahead of the London Olympics.
Wiggins crashed out of the 2011 Tour at the end of the first week, suffering a broken collarbone.
Boardman - who was an Olympic champion at the 1992 Games in Barcelona before turning to the road - said Wiggins had already "done the gold medal thing".
He said the 31-year-old should therefore place more importance on doing well in next year's Tour.
The London 2012 opening ceremony on 27 July is just five days after the scheduled end of the Tour.
Boardman said: "When you ride a Tour you either come out of it completely nailed or in the form of your life and it's impossible to replicate it in training.
"The key thing is you have to choose what your priority is because you are taking a risk.
"If you are going to do the double then you are risking the Olympics and saying the Tour is most important - and frankly for Bradley I think it should be at this stage of his career.
"He's done the gold medal thing. This should be more important for him."
Prior to his crash on stage seven, Wiggins was described as being in the form of his life.
Team Sky boss Dave Brailsford predicted Wiggins would have finished in the top three.
Drawing on his own experience after crashing out of the 1995 Tour, Boardman, three-times a Tour prologue winner, backed Wiggins to bounce back.
He said: "When something happens that is beyond your control, you're the person that deals with it quite well. There's nothing you can do.
"When something's broken, there's no answer. All the decisions are taken on your behalf, so you just get on with it.
"I had a fantastic summer holiday for probably the first time in a decade and was just a normal guy. I thoroughly enjoyed it.
"I came back the next year in '96 and had the best form I ever had."
Wiggins won Olympic medals of every colour in Athens in 2004 and in Beijing four years later claimed two gold medals.
The following year, he finished fourth in the Tour, equalling Robert Millar's best result by a Briton from 1984.
Wiggins became Team Sky's marquee signing but faltered in their debut Tour in 2010, finishing 24th after struggling in the mountains.