I'd like to see frame materials and aero wheels go in there.

I'd also like to see TT bike changes in a separate list.

Not in this race. He had both brifters on in San Sebastián in 1994. I can't speak for the other riders because there weren't any close-up shots of them.

1930ish Campagnolo introduced quick release skewers.

The threadless stem was available well before 1999. I have a 96 Cannondale with one. Bike Pedia lists several in 1997.

Neat idea for a thread!
Triathletes were using Scott bars in the 80's which were commercially available before Lemond debuted them in the Tour Prologue.
The first time I ever saw any version of the modern time-trial position was Pete Penseyres RAAM bike in 1986. It was more like a table-top apparatus affixed to standard bars than a tri-bend:

http://www.ultracycling.com/images/p...s_1986raam.jpg

But that was just the first time I'd ever seen anything like it; there could have been something that preceded. I actually ran into Pete and Lon Haldeman on the road to Palm Springs once. He had those bars on the front of their tandem and they were changing a flat. They were pretty cool for Ultracycling legends, and I rode 202 miles that day.

Edit: Wow! Turns out Pete's record average MPH from 1986 remains unbroken to this day. (Clicky.)

I'm pretty sure I was riding a set of these Scott Tri Bars (right) in '86 or '87 before Lemond introduced them to Europe. All us triathletes had 'em!

http://www.crank.co.za/wp-content/up.../brad_1987.jpg

Doesn't sound right. I had a threadless bike that was a 99/00 and don't remember it being anything new at the time. Looks like Cane Creek filed the patent in 1990.

It would be interesting to narrow down when the pros started using threadless stems. I could make out that the three riders in San Sebastián in 1994 that the camera got close enough to had quill stems.

I also think it would be fun to get more info on the transition from downtube shifters to brifters in the 1990s. Who were the last downtube holdouts in the peloton?

I just realized that I have the 1997 Giro on my hard drive, too. I saw a mixture of quill and threadless stems in that one.

Here is a time line I found...

http://www.ibike.org/library/history-timeline.htm