STC (Shark Tooth Clamping) inside the stem to help grip the bars, 48mm wide faceplate with central bore for reduced weight, unique side pocket detail. - 6061-T6 alloy - STC (Shark Tooth Clamping) inside the stem to help grip the bars - Bar Clamp Diameter (mm): 22.2 - Steerer Clamp Diameter: 1-1/8-inch - Weight (oz): 10.8 - Stem Type: Top Load