Clamp Diameter: 1.1 inches (28.6 mm), 1.2 inches (31.8 mm), 1.3 inches (34.9 mm); Average Weight: 1.0 oz (28 g) (catalog value); This adapter converts directly attached front derailleur to band type. Now there is a few 1.1 inch (28.6 mm) setting. The color of the product may look different from the actual product depending on your display settings. Please be aware that product specifications, logos, and other designs are subject to change due to improvements.