This aftermarket variable speed pulley is for the belt-drive system on compatible riding lawn tractors. It helps transfer belt power through the variable speed drive, keeping the tractor moving as the drive system changes speed. Replace the pulley when the sheave is worn, damaged, noisy, or no longer keeping the belt aligned. Built to match OEM This pulley is made as a faithful replacement for the original part dimensions, with a 0.38 inner diameter, 4.5 outer diameter, and 2.92 overall height. The mounting design uses an M10x1.5 bolt specification and is shaped to match the original variable speed pulley layout for proper belt tracking. Installation Installation is typically a bolt-on repair using standard hand tools once the belt tension is relieved and the drive belt is removed from the pulley. No cutting, welding, or modification should be needed when the part is matched to the correct tractor application. Check belt condition and routing during installation, since a worn or misrouted belt can shorten pulley life. .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; } }