The shimano dura ace 900 c24 cl carbon laminate 24mm wheelset has been designed to meet pro road race criteria low rim weight is achieved by reducing the alloy wall thickness from 13 mm down to 07 mm then a patented phosphoric acid anodizing process is used to bond the carbon fibre to the alloy giving an excellent combination of low weight strength and rigidity the shimano dura ace 900 wheelset comes with carbon reinforced spoke eyelets and an alloy clincher rim that maintains high braking