The John Deere AE21772 is a genuine OEM chain sprocket designed for various John Deere agricultural machines. This critical component ensures efficient and reliable power transmission within the drive system. Manufactured to John Deere's stringent quality standards, the AE21772 sprocket provides durability and precise fitment, crucial for maintaining optimal machine performance and longevity. It is engineered to withstand demanding operational conditions, making it an essential replacement part for maintaining the integrity of your John Deere equipment.