The Contact SL AeroLight is a lightweight and rigid aluminium stem designed exclusively for the OverDrive Aero steering system, offering aerodynamic integration, easily adjustable cable routing and a sleek look. fEATURES compatible only with OverDrive Aero steering, which is used on newer road bike models integrated aero design unifies the top cap, cables and wiring with the head tube for better aerodynamics ultra-lightweight aluminium construction provides maximum rigidity at extremely low weight easy cable routing - everything is hidden for optimized aerodynamics and a sleek look fits current generation Contact Aero or Contact D-Fuse handlebars -10° angle offered in eight lengths from 70 to 140 mm for 31.8 mm handlebar diameter fork post shape/diameter: D-shaped OverDrive Aero post, 1 ¼" height: 40 mm weight: 161 g (100 mm length)