The first Deda stem that\'s designed to allow fully integrated cable routing when assembled with other Deda handlebars featuring the all new DCR system (Deda Internal Cable Routing) The Vinci is the most versatile stem on the market being compatible with traditional 1-1/8 fork steerers as well as 1-1/4 . The DCR system works with a standard tapered steerer with 1-1/8 upper diameter but requires a 52mm (1.5 ) upper headset bearing. The stem leaves room at the back for the cables to fit the gap in between the headset bearing and fork. The Vinci Stem system features special spacers that provide the channels for the housing cables. The Spacers are designed with slits that let them pull open, they can be added or removed to get the fit right without having to remove all the cables. The innovative 3D forging technology and the flat design result in a better aero performance. The aero integrated top cap, headset spacers and alloy sleeve adaptor for a 1-1/8 fork steerer complete the line of accessories included. Tech Specs: Material: Alloy 2014 Screws: Steel, Black Angle: 73deg Handlebar Dia: 31.7mm Fork Steerer: 1-1/4 (31.75mm), adaptor included for 1-1/8 Drop: (Incl. the upper headset spacer) 40mm Length: 90, 100, 110, 120, 130, 140mm Weight: 190g