Profile Design Boa 120mm 130d 1-1/8" Threadless Silver Clamp Diameter: 25.4mmClamp Diameter: 25.4mmSteer Tube Clamp Diameter: 1-1/8"Steerer Tube: 1-1/8" ThreadlessStem Color: SilverStem Length: 120mmStem Rise: 40 degWeight: 277g