The John Deere R165605 is a genuine OEM final drive ring gear engineered for heavy-duty John Deere 8000 and 9000 series agricultural tractors. This essential component is crucial for the final drive assembly, facilitating robust power transmission to the wheels and ensuring the machine's mobility and operational performance. Manufactured to John Deere's stringent quality standards, the R165605 ring gear offers exceptional durability and precise fitment across a wide range of models, including 8100, 8200, 8300, 8400, 9100, 9200, 9300, 9400, 9520, and 9620 series tractors, both wheeled and track versions.