The MTD 634-05664A Lawn Tractor Caster Wheel Assembly helps provide smooth movement and stable support for compatible lawn tractors during operation. This caster wheel assembly allows the front section of the tractor to roll and turn properly while supporting controlled movement across the lawn. A properly functioning caster helps maintain maneuverability and steady handling. Replacin... https://www.wholetoolbox.com/mtd-634-05664a-lawn-tractor-caster-wheel-assembly/634-05664A.html