The 32 year old claimed his fourth Olympic gold and seventh medal in all, Air Max 90 White And Green
Froome was third fastest in 35:25, with Cancellara fifth fastest.
July Finishes fourth in Tour de France prologue in London behind Swiss winner Fabian Cancellara but his team, Cofidis, later withdraw after team Nike Air Max 90 Dark Loden
Bradley Wiggins became the first man to win the Tour de France and Olympic gold in the same year with an imperious victory in the London 2012 time trial.
The Londoner showed no signs of fatigue following Saturday's road race and reached the first time check after 7.3km, in 8:27, five seconds behind Martin, but thereafter forged forward and took the lead at the second time check, after 18.4km.
World champion Tony Martin of Germany clocked 51:21 to claim silver.
Wiggins was the penultimate of 37 riders to take to the course and completed the 44 kilometre route in 50 minutes 39 Air Max 90 With Jeans seconds to triumph by 42 seconds, with fellow Briton Chris Froome third in 51mins 47secs.
mate Cristian Moreni fails a drugs test.
Wiggins was 11 seconds faster than the German, going through in 23:14 and enhanced his advantage at the third on course time check, after 29.9km and Nike Air Max 90 Iron Metallic Red Bronze Gold
Wiggins accepted the acclaim of the crowd and a warm embrace from Martin after achieving the second of his two main goals for 2012.
The Briton was 22 seconds quicker than Martin, going through in 34:43, compared to the German's 35:06.
Cyclist Bradley Wiggins lands Olympic gold in men
Froome finished second to Wiggins in each of the Tour's two long time trials in claiming second spot in Paris overall and replicated those performances, finishing strongly to set the provisional best before Martin and then Wiggins beat him.
surpassing Sir Steve Redgrave with a British record haul of Games medals.
June Prologue victory in Dauphine Libere.
with 14.1km remaining.
Wiggins won the Tour's two long time trials last month and was optimistic of success after three Olympic gold medals on the track and six in all in his previous three Games.
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