One thing I didn't know is that today's top pro riders (especially UCI pro teams) are often "billboards" of the bike industry as a whole. They are supplied by companies with framesets, groupsets, wheels and others. Not necessarily do they believe their bikes are the fastest available, nor even fit them the best. Is Trek, Specialized, Pinarello or Canyon selected because of their performance? No. Those are used because those companies ask riders to 'advertise' their bikes.
As such, most of their bikes aren't custom-made, just as the same ones commercially available in your local shops. Perhaps with the exclusive painting, but even those 'pro color' models are (if limitedly) released to us.
I've been collecting information on bikes of the all Grand Tour winners, but as for Tour de France, here's the list of the past 15 years. Technically speaking, 1999-2005 should have no winner, but still for reference.
| Framesets & Manufacturer | Groupset & Manufacturer |
----+------------+------------------+------------+-------------+
2014|Specialized |Tarmac S-WORKS | Campagnolo |Super Record |
2013|Pinarello |Dogma 65.1 THINK2 | Shimano |Dura-Ace |
2012|Pinarello |Dogma 65.1 THINK2 | Shimano |Dura-Ace |
2011|BMC |SLR01 | Shimano |Dura-Ace |
2010|Specialized |Tarmac S-WORKS | SRAM |Red |
2009|Trek |Madone 6 | SRAM |Red |
2008|Cervelo |R3-SL | Shimano |Dura-Ace |
2007|Trek |Madone 5.2 | Shimano |Dura-Ace |
2006|Pinarello |Dogma-FPX | Campagnolo |Record |
2005|Trek |Madone SSLx | Shimano |Dura-Ace |
2004|Trek |Madone SL | Shimano |Dura-Ace |
2003|Trek |5900 | Shimano |Dura-Ace |
2002|Trek |5900 | Shimano |Dura-Ace |
2001|Trek |5900 | Shimano |Dura-Ace |
2000|Trek |5900 | Shimano |Dura-Ace |
1999|Trek |5500 | Shimano |Dura-Ace |
Some random notes...
- The first carbon winner bike appears in 1986, and since then the material of racing bicycles have been gradually replaced by carbons.
- Although now bikes are well recognized as their 'bike names' and 'manufacturers', such notion was less apparent until around 1980s. We can still know what companies manufactured those bikes (e.g. Gitane or Peugeot) or what companies manfactured tubes of framesets (e.g. Reynolds or TVT), but I think who made them also did matter at that time, while most stuff are now mass-created in Asia.
- The list is pretty Shimano-dominated, but it's actually where they finally started doing so.