This custom shaped alloy base bar is designed for optimized aerodynamics to allow you to cut through the wind. Flat wing design will ensure your comfort during long rides. The bar is constructed of AL6066/T6 triple butted and smooth wedled constructiona nd designed for internal cable routing. Fits 26.0 stems and most standard clip-on aero extensions. Center to center widths available: 40cm, 42cm. Weighs 250 grams.