Feature: 1.?FUNCTION? The bike chainring can reduce the chain drop, the gears are neat and symmetrical, and the chain is highly fitted and firmly engaged. 2.?STABLE PERFORMANCE? 56 teeth chainring, wear resistance and friction resistance, silent working without noise. 3.?CONVENIENT TO USE? Stylish and special appearance, fine workmanship, easy to install and easy to use. 4.?HIGH QUALITY MATERIAL? The bike chainring is made of high quality aluminum alloy material, durable, sturdy and has a long service life. 5.?PRACTICAL? Practical tools, ideal substitutes for road bikes, bicycle motocross, and folding bikes. Specification: Item Type: Bike Chainring Material: Aluminum Alloy Color: Gold Outer Diameter: Approx. 23cm/9.1in Inner Diameter: Approx. 11.8cm/4.6in BCD: Approx.130mm/5.1in Weight: Approx. 255.0g/9.0oz Quantity: 1Pcs Model: ZDP 04 Specification: 56T Application: Road bikes, bicycle motocross, folding bikes Package List: 1 x Bike Chainring Note: Please allow 1?2cm/0.4?0.8in error due to manual measurement. Thanks for your understanding.