Renthal's revolutionary Duo stem combines high strength with ultra-low weight. The stem is horizontally divided, allowing it to be machined in two pieces. This method gives unrestricted access to the stem core, enabling weight to be reduced to the absolute minimum, without compromising strength. In addition this provides an uninterrupted U-shape clamping area, which eliminates the stress risers found on most other stems, which can lead to handlebar failure.   FEATURES: CNC machined from 6082 T6 aluminium alloy Split stem design for maximum weight reduction U-shape cradle clamp eliminates handlebar stress raisers found with traditional stems Offset: 50mm Rise: 10° Stack Height: 50mm Handlebar Clamp Diameter: 31.8mm Steerer Clamp: 28.6mm (1 1/8") Weight: 143g (including bolts)