It looks like Cadel was running the equivalent of a Zipp 404 on his front wheel in today's TT, while other riders were on more aerodynamic rims.
Any idea why he would choose such a low profile front wheel for the long TT? I would have expected him to be running something more like a Zipp 808 on the front. Given his performance, perhaps he should have been...
FWIW, Sastre's front wheel looked more like an 808, in terms of rim depth.
Sastre was on a Zipp 1080 with the Sub-9 Disk.
Cadel was on a Campagnolo Bora with some disk.
The Zipp 1080 is 108mm deep, the Bora is only 50mm.
Campagnolo doesn't make any wheels deeper than 50mm.