• Team Sky principal undecided over choice of team leader • Wiggins: 'For me it was all about winning the Tour once'

Bradley Wiggins, who became the first British rider to win the Tour de France in July, said on Wednesday that he is content with his single victory and is unlikely to attempt a defence of his yellow jersey next summer.

Speaking in Paris at the unveiling of the route of the 2013 centenary edition of the race, he said he is more likely to concentrate on the Giro d'Italia, which precedes the Tour, and would have no problem with the idea of going on from there to play a supporting role in France to his team-mate Chris Froome, who finished one place below him on this year's podium in the Champs Elysées.

"I haven't got that much of an ego," Wiggins told Eurosport. "It was always about winning one Tour de France for me and I'm proud of the way that I did it. Cycling's a team sport and I wouldn't have won last year if it hadn't been for the help of my team-mates, so if I can play a part in one of them winning next year that would be great.

"If everything goes to plan and I get the nod to do the Giro, that's what is going to happen. I'm a great historian of the sport and I'd like to win a pink jersey [for the Giro winner] to go with the yellow one."

With four mountain-top finishes – including the Mont Ventoux and an unprecedented double ascent of Alpe d'Huez – and fewer time trial kilometres than in 2012, next year's Tour parcours is more likely to suit Froome, who showed his climbing ability this year. For curbing his own ambitions and working in support of Wiggins, Team Sky are likely to reward the 27-year-old Kenyan-born rider with leadership of the nine-strong squad when the 2013 Tour starts in Corsica on 29 June.

"I just want to be in a successful team," said Wiggins, who will be 33 in May. "If that's Chris [as the leader], then so be it."

Dave Brailsford, the Team Sky principal, refused to commit himself to an early decision over the leadership. "It puts us in an interesting position," he said. "It's not about one rider or another but about the team, to put our best team out to try and win the race."

Froome was also guarded. "It's something I'd like to do but as a team we have to decide what the best tactic will be," he said. "We should decide over the winter so we can train accordingly." The course, he added, was challenging but not as intimidating as he had feared.

The planning of Sky's attempt to repeat this year's overall victory will be simplified by the departure of Mark Cavendish to join the Belgian-based Omega Pharma-QuickStep team. For the Manxman, who will again target the points winner's green jersey, there is the twin lure of an opening day featuring a finish designed to end in a sprint in Bastia and a final stage in which the charge up the Champs Elysées, timed to finish in the Parisian twilight, will go all the way to the Arc de Triomphe.