Truvativ Hussefelt Bike Stem Clamp Diameter: 31.8 millimeter, Clamp Diameter: 31.8 millimeter, Steer Tube Clamp Diameter: 1-1/8-Inch Steerer Tube: 1-1/8-Inch Threadless, Stem Color: Sno White, Stem Color: snow white, Stem Length: 40 millimeter, Stem Rise: 0 deg