Pro-level features at a true racer’s price. This 3D mesh-forged 6061 aluminum stem offers a +/- 30-degree stem angle for riders seeking a more comfortable fit. The angled clamp slot for the steerer tube reduces stress on carbon handlebars. • Intended use: MTB • Handlebar clamp: 31.8 mm • Steerer tube diameter: 1 1/8 inches • Angle: 30° • Material type: Aluminum stem • Design: Ahead.