Bradley Wiggins will today bid to end a troubled year on a high with victory in the Road World Championships time-trial.

After abandoning May's Giro d'Italia through illness and missing the defence of his Tour de France title through injury as Chris Froome won, Wiggins' desire has returned and so too has his form.

The 33-year-old Londoner completed victory in the Tour of Britain on Sunday in a result secured by a devastating time-trial display and now is targeting the rainbow jersey of world champion on the 58-kilometre course through Tuscany.

And Wiggins believes his time-trial form is better than when he won the London 2012 title.

"I know what I've got to do, I've just got to go out and put it together," Wiggins told Press Association Sport.

"I've probably done more specific work for this one than (the Olympics). I'm as prepared as I'll ever be for a time-trial."

Six times a world champion on the track - in events from the 4km individual pursuit and team pursuit to the Madison - Wiggins is bidding for his maiden road world title.

"It would be fantastic, just to add it to the Olympic title would be up there with my best achievements," Wiggins said.

"It's a beautiful course. It'll be one of the best courses I've ridden. It's very straightforward. It's going to be tough for a lot of people but if you're in good shape, it's a great course."

To triumph Wiggins, who became Britain's first Tour de France champion and Olympic time-trial champion within 10 days in 2012, must finish ahead of one of the most competitive fields assembled for the race of truth - the rider against the clock.

Two-time defending champion Tony Martin of Germany, four-time world champion Fabian Cancellara of Switzerland and the United States' Taylor Phinney are expected to be Wiggins' main challengers.

Briton Alex Dowsett, a time-trial stage winner at May's Giro d'Italia, is also capable of a high placing.

Cancellara is also targeting Sunday's road race, in which Wiggins will support 2013 Tour de France champion Chris Froome's bid for glory, despite the two Britons enduring a fractious relationship.

Wiggins is frank and focused when it comes to his time-trial rivals.

"I don't really care about them, if I'm honest," he said. "It's not really one you can control. Ultimately it's about what you can do. That's why I love this race; you don't have to worry about anybody else."