When it's time to replace a belt, you'll appreciate the ease of installation that comes from the true-fit sizing for the application they were made to fit. Oem Replacement Belt 265-513 For Exmark 103-2240 Designed to handle one of the toughest jobs in lawn care, Stens OEM replacement belts resist the many stresses that can prematurely shorten the life of a belt. Admittedly, belts are a component that will eventually wear out, but the belt you choose can make a difference in how often replacement is necessary.