Renthal\'s revolutionary DUO™ stem combines high strength with ultra low weight. The stem is horizontally divided down the centre which allows it to be CNC machined in two pieces. This method allows unrestricted access to the core of the stem which enables weight to be reduced to the absolute minimum without compromising strength. In addition this gives an uninterrupted U shape clamping area, which eliminates the stress risers found on most other clamps which can lead to handlebar failure.  Rise 10 deg,Length 40 or 50mm,Weight 124g (40mm), 137g (50mm) including bolts,Handlebar Clamp Diameter 31.8mm,Material 6082 T6 aluminium.