The MTD 684-04159C Friction Wheel Assembly helps transfer drive power within compatible MTD snow blower applications. This assembly works with the drive system to support controlled movement and consistent traction during snow removal. It is a practical replacement for a worn, damaged, or faulty friction wheel assembly that may cause slipping, reduced drive performance, or inconsisten... https://www.wholetoolbox.com/mtd-684-04159c-friction-wheel-assembly/684-04159C.html