The John Deere M170230 Pulley is a genuine OEM replacement part designed for a wide range of John Deere ride-on mowers and zero-turn mowers. This essential component ensures proper belt tension and smooth operation of various mower deck systems. With an outer diameter of 101.6 mm, an inner diameter of 17 mm, and a height of 22.2 mm, this pulley is engineered to meet original specifications for durability and performance. It is compatible with numerous models including the 100, D, E, L, LA, S, X, and Z Series, providing reliable fitment and maintaining optimal machine functionality.