I ride my late 80's vintage
Trek 770 converted to fixed-gear as my commuter. Great fun and good for the spin. On the weekends and evening training rides I ride my Litespeed Classic, with full Ultegra 9-speed, Speedplay pedals, and Mavic Ksyrium wheelset. I also ride a Cannondale mountain bike when the need arises and a Cannondale MT1000 tandem when my wife is in the mood for a fun ride.
Hmmm?? Maybe I have too many bikes or is that really possible?