Profile Design Boa 25.4 90mm 130d Silver 1-1/8" Quill Mountain Stem Clamp Diameter: 25.4mmClamp Diameter: 25.4mmSteer Tube Clamp Diameter: 1-1/8"Steerer Tube: 1-1/8" ThreadedStem Color: SilverStem Length: 90mmStem Rise: 40 degWeight: 277g