Bike Chainring Universal 9T 13T Gear Motor Bicycle 9 Teeth 13 Teeth Sprocket for Ordinary Bicycle parts Dirt Pit Bike Bike Chainring Universal 9T 13T Gear Motor Bicycle 9 Teeth 13 Teeth Sprocket for Ordinary Bicycle parts Dirt Pit Bike Feature: 1. This is a bicycle chain sprocket, made of good quality material. 2. Made of good quality aluminum alloy, sturdy and durable to use. 3. Suitable for ordinary bicycles. 4. Small size, lightweight. Very easy to install, and smooth performance. Specification: Condition: 100% New Item Type: Pinion Gear Material:Carbon Steel Color: as picture shown Number of teeth: 9,13 Teeth Thickness: 3 mm Inner diameter: 10mm Outer diameter: 41/58 mm Thickness: 9 mm Bolt width: 4mm (fixed tip key width) Package List: 1 x Gear _x000D_