The MTD 1768169 Left Hand Spindle Assembly is a genuine OEM replacement component, also known by the current MTD part number 91804134B. This critical assembly is designed for various MTD, Cub Cadet, Troy-Bilt, and other brand riding lawn mowers and tractors, supporting the mower blade for smooth and efficient operation. It features a shaft length of 165.1 mm (6.5 inches) and an overall length of 190.5 mm (7.5 inches), with a pulley diameter of 139.7 mm (5.5 inches). This durable spindle assembly weighs approximately 2.04 kg (4.5 lbs) and replaces multiple older part numbers including 61804134, 61804134A, 61804134B, 91804134, and 91804134A.