When did Square Taper Bottom Brackets retire from racing? I haven't been able to find any hard data on this. I have the impression that most top-end bikes made the switch around the year 2000.

It would be great if I could get an answer for both of these:


When was the first alternative to ST used in pro racing?
When was ST used for the last time in pro racing?
"First alternative" is a little tricky because if you looked hard enough you could potentially find a pro riding Sweet Wings cranks in the early 90s, which use a spindle and bottom bracket design thats very much a forebearer of external bearing cranks. And if you're not just talking road, you'd be able to find plenty of examples of MTB/DH and of course BMX riders riding Profile and other splined spindle tubular chromoly cranks also in the 90s. There were other 90s high end non square cranks too made by Bullseye and Tioga that could have found their way on to pro bikes.

Campy held out on ditching square taper for a long time. I want to say Ultra-Torque wasn't released until 2007 and before then all their cranks were ISO square. I would suspect the last square cranks in the peloton were on all-Campy bikes.