Let me introduce you to our new 38mm and 58mm full carbon tubulars. These are the result one years worth of development and testing. Our goal at Williams was to develop a durable high performance set of carbon tubulars athletes can race week in and week out. These wheels Come with the latest hybrid ceramic bearings and hub design features. They are smooth as glass and are built to do one thing...RACE HARD. I am very happy with these wheels and look forward to seeing them all over North America this year.