I don't know, but they are fun to play with. I ride my Madone most all the time, but keep the Bianchi has a back-up trainer/rain bike. Lately I've taken to thinking about making it my TT bike. You know spend lots of money for 20K once a month for 8 months. First I added some aero bars, and just this week, bought some Pro-Lite 50mm demo clinchers. I'm not sure how much faster I'll be, but the bike really makes you think you are fast. It still weighs a ton, but hey not bad for my Italian budget TT'er.