The Bolens 1749911 Idler Pulley is a genuine OEM replacement part designed for various Bolens lawn and garden tractors. This idler pulley helps maintain correct belt tension, ensuring efficient power transfer and smooth operation of your equipment's drive system. Constructed for durability, it provides reliable performance and extends the life of your belts. With an outer diameter of 114.3 mm and a bore of 9.525 mm, it's a direct fit for specified models.