The Dimension Threadless Stem is a fully forged 6061-T6 aluminum stem with 4-bolt handlebar clamp for 31.8mm bars. Available in multiple lengths and angles for the right fit. Features: 2-D forged AL-6061-T6 Four-bolt handlebar clamp Dimension stems are not intended for use with carbon handlebars or carbon steerer tubes Specifications: Bar Diameter: 25.4mm Steerer Diameter: 1-1/8" (28.6mm) Length/Reach: 60, 70, 80, 90, 100, 120, 130mm Stem Angle: 7deg Stack Height: 41mm Material: Aluminum Color: Silver Weight: 160g (100mm)