Profile Design Hammer OS 1-1/8 Stem - 90 degrees/110mm Constructed of 3-D forged 6061-T6 aluminum Length: 60, 70, 80, 90, 100, 110, 120mm Clamp size: 31.8mm Steerer Diameter: 1-1/8" Rise: 80 or 90 (reversible for a 100 rise)