Description: Fits 420 Chain Diameter of Sprocket / Cog: around 6.69" (170mm) Diameter of Centre Hole: around: 2.05" (52mm) Distance Between Mount Hole(centre to centre): around 1.89" (48mm) Tooth: 41 Teeth Package Includes: 1 Piece Rear Chain Sprocket Note: 1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) 3. Instruction is not included. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you
