Pro caliber features at a true racer price. This 3D net-forged 6061 aluminum stem offers +/- 30 degrees of stem angle for riders who want a more comfortable fit. The angled clamping slot for the steering tube reduces the load on carbon handlebars. - Material type: aluminum - Purpose: MTB - Handlebar clamping (mm): 31.8 mm - Fork steerer tube diameter: 1 1/8 inch - Angle (in °): 30 ° stem - Type: Ahead.