There's a terrific article by Joe Lindsey on the bicycling.com site
about the time trial bikes used today. The link doesn't seem to be
working; I'll post it when I find it.
Among other things, it notes that Ullrich's TT bike of last year (and
today) is made by a small Swiss company, has a 120mm rear spacing
(like my fixed gear!) and a 50mm bottom bracket, apparently the
inspiration for the new prototype TT frame from Trek shown on the
Lance Chronicles, which Lance seems to have rejected using.
A blurry freeze frame from the prologue seems to show an eight speed
cluster in the back for Ullrich today. I'm surprised even that many
will fit in a 120mm spread.
Also interesting: apparently the wrists-down hand posture Ullrich used
last year, with very straight aero extensions (lacking any upturn at
the end), has proven to be far superior in the wind tunnel in various
competitors' tests, and pretty much everyone is using it: Tyler and
Lance included.
I'm surprised the aerodynamics haven't been studied to death by
triathletes. Nice to know you can still squeeze blood from the
stone.--Shayana Kadidal