This one could also be posted in the Wiggins Cadence topic but I seem not to be able to find it.
There is this thing:
http://www.cyclingpowerlab.com/ProRaceAnalysis.aspx
Tour de France 2012
prologue
1 Fabian Cancellara (Swi) RadioShack-Nissan (1.86,82)
0:07:13 0.22
511Watts 6.23w/k 2320
2 Bradley Wiggins (GBr) Sky Procycling (1.9,69)
0:07:20 0.227
489watts 7.08w/k 2154
3 Sylvain Chavanel (Fra) Omega Pharma-QuickStep (1.82,70)
0:07:20 0.221 479 6.84 2169
4 Tejay van Garderen (USA) BMC Racing Team (1.85,69) 0:07:23 0.223
474 6.86 2122
5 Edvald Boasson Hagen (Nor) Sky Procycling (1.81,73) 0:07:24 0.219 467 6.4 2134
6 Brett Lancaster (Aus) Orica GreenEdge Cycling Team (1.88,78) 0:07:24 0.223 479 6.14 2150
7 Patrick Gretsch (Ger) Argos - Shimano (1.87,69) 0:07:25 0.225 470 6.82 2094
8 Denis Menchov (Rus) Katusha Team (1.8,65) 0:07:26 0.221
458 7.04 2071
9 Philippe Gilbert (Bel) BMC Racing Team (1.79,67) 0:07:26 0.22 457 6.82 2081
10 Andriy Grivko (Ukr) Astana Pro Team (1.8,67) 0:07:28 0.22 453 6.76 2056
11 Christopher Froome (GBr) Sky Procycling (1.86,69) 0:07:29 0.224
458 6.64 2046
36 Richie Porte (Aus) Sky Procycling (1.72,62) 0:07:35 0.216
423 6.83
Tour de France second TT
1 Bradley Wiggins (GBr) Sky Procycling (1.9,69) 1:04:13 0.227
479watts 6.95w/k 2114
2 Christopher Froome (GBr) Sky Procycling (1.86,69) 1:05:29 0.224
451watts 6.53w/k 2013
3 Luis Leon Sanchez Gil (Spa) Rabobank Cycling Team (?,?) 1:06:03
4 Peter Velits (Svk) Omega Pharma-QuickStep (1.81,65) 1:06:15 0.222 430 6.62 1941
5 Richie Porte (Aus) Sky Procycling (1.72,62) 1:06:38 0.216
413 6.66 1909
6 Patrick Gretsch (Ger) Argos - Shimano (1.87,69) 1:06:41 0.225 431 6.25 1919
7 Tejay van Garderen (USA) BMC Racing Team (1.85,69) 1:06:47 0.223
427 6.19 1914
8 Vasili Kiryienka (Blr) Movistar Team (1.83,72) 1:06:59 0.221 423 5.87 1914
9 Rein Taaramae (Est) Cofidis, Le Credit En Ligne (1.86,70) 1:07:03 0.224 424 6.06 1897
28 Denis Menchov (Rus) Katusha Team (1.8,65) 1:08:41 0.221
391 6.01 1768
Assuming these numbers are correct I notice several things.
Wiggins:
* 7 minutes effort: 489watts
* 64 minutes effort: 479watts
Froome:
* 7 minutes effort: 458watts
* 65 minutes effort: 451watts
Van Garderen:
* 7 minutes effort: 474watts
* 67 minutes effort: 427watts
Menchov:
7 minutes effort: 458watts
69 minutes effort: 391watts
Porte:
* 7 minutes effort: 423watts
* 66 minutes effort: 413watts
So, Sky riders loosing at max 2% power over an effort almost 10 fold, other riders clearly loosing 10-15%. the odd duck being the duck from Jose Taus's club, Velits.
Lets move on to the Olympics:
1 Bradley Wiggins (Great Britain) (1.9,69) 0:50:39 0.227
478 6.92
2 Tony Martin (Germany) (1.86,75) 0:51:21 0.222
458 6.11
3 Christopher Froome (Great Britain) (1.86,69) 0:51:47 0.224
446 6.46
And then over to the World TT:
1 Tony Martin (Germany) (1.86,75) 0:58:38 0.222
451 6.01
Since Martin had a mechanical at the prologue that cost him at least 20 to 25 seconds we have no real comparison for his drop of.
45 Tony Martin (Ger) Omega Pharma-QuickStep (1.86,75) 0:07:36 0.222
443watts 5.9
He would have come in around the time of Cancellara, wattage must have been in the 485-495 range.
So, the best TT'er of the last few years also looks to have a dropoff of around 10% on efforts 10 fold a prologue but the Skyboys not?