This variable speed pulley is an aftermarket replacement for compatible MTD and White lawn tractors. It belongs in the drive system and helps control ground speed by moving the belt through the variable-speed pulley arrangement. Built to match OEM The pulley is made to match the factory-style shape and function needed for proper belt tracking in the variable speed drive. It is built as a direct replacement part, with the mounting and belt contact surfaces intended to line up with the original drive components. Installation Installation is straightforward for a DIY mechanic familiar with mower belt and pulley service. Use normal hand tools, relieve belt tension before removal, and install it in the same position as the old pulley; no modifications are intended when used on a compatible machine. .product-description-v2 { font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica, Arial, sans-serif; color: #1d1d1d; line-height: 1.55; max-width: 720px; } .product-description-v2 > div { margin-bottom: 18px; } .product-description-v2 h3 { font-size: 16px; font-weight: 700; color: #1d1d1d; margin: 0 0 8px; } .product-description-v2 p { margin: 0; font-size: 15px; } @media (max-width: 768px) { .product-description-v2 { font-size: 15px; } }