Simplicity with a beautiful complexion part of the dura ace 9100 evolution of shimanos ongoing passion for technology the c24 wheelset is both simple and beautiful with an understated look typical of shimanos design however you should never underestimate the performance from the understated look providing a lower weight and higher stiffness rapid engagement the dura ace c24 carbon laminate boasts ultra quick engagement every 10 degrees with a lightweight titanium freehub the acceleration