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Only 1 of the 4 Worlds TT wins for both of these riders last over an hour.
https://en.wikipedia.org/wiki/UCI_Road_World_Championships_%E2%80%93_Men%27s_time_trial -
"UK outfit Cycling Power Lab analysed data from the 2011 time-trial World Championships, where Tony Martin beat his nearest rival, Bradley Wiggins, by a shade over 1 minute 15 seconds over a course of 46.4km. It estimated that Martin’s average power during the race was a staggering 481 watts"
"it is estimated that Tony Martin averaged over 450 watts for an hour and 5 minutes last year when he won the World Time Trial Championships"
out on the road, cancellara and martin were around 460 to 480 watts for the worlds TT's when they were competitive. or at least that was what was rumoured. those races lasted often slightly over the hour...