What bicycles have you ridden your centuries (or brevets, or double centuries) on?
Here's my list, complete with photos:
1) Venture - a steel department store bicycle
2) Gitane - a tandem
3) Mongoose - a steel department store mtn bike
4) Giant OCR3 - an aluminum racing bicycle (actually, I've had two of these, and have done long rides on both)
5) Marinoni Ciclo - a steel sport touring bicycle