Grunge presents a 31.8mm clamp 40mm short stem. Perfect for active fan riding bikes Handle clamp width is 1.8 inches (45 mm) and direct handling. 6061-T6 aluminum 1-1/8" 1.6 inches (40 mm), Column Height: 1.7 inches (42 mm), Clamp Diameter: 1.2 inches (31.8 mm), 3°/87° Weight (Catalog Value): 4.6 oz (132 g) (Weight with H clamp) *The color of the product may look different from the actual product depending on the type of display. Product specifications, logo design, etc. may be subject to change for product improvement. We also cannot answer measurements or personal fit that the manufacturer does not announce. Thank you for your understanding.