1Applicable Model: The front sprocket is for Chinese 200cc engines, replacement for Coleman CT200U mini bike. Please confirm whether it is consistent with the product you want before buying to avoid unnecessary return. 2Premium Material: Made of high strength and robust steel alloy, the chain sprocket crafted to withstand everyday wear, tear and rust, while maintaining superior performance. 316mm Hole Diameter: The 420 chain bike sprocket features a 16mm bore for compatibility with a variety of mini bike models, can be a practical and versatile addition to your mini bike assembly. 4Enhanced Performance: The 10T front sprocket enhances bike performance by providing efficient chain use, ensuring smoother rides and constant reliable power transfer. 5Easy Installation: The front chain sprocket is easy to install, making it the ideal replacement for your mini bike sprocket. Avoid unnecessary bike downtimes with this convenient and robust chain sprocket. Item Type: Front Sprocket Teeth: 10T (Fit for 420 chain only) Hole Diameter: Approx. 16mm / 0.6in Application: This front sprocket is used for Chinese 200cc engines, specifically replacement for Coleman CT200U mini bike. May be used on other applications as well. 1 x 16mm 420 10T Front Sprocket 1 x Key