Maxpower 13631 Spindle Assembly Replaces MTD/Cub Cadet/Troy-Bilt 918-04474A, 618-04474,  91804474B and Toro 112-6083 Spindle Assembly for MTD Cub Cadet 918-04474A, 618-04474 and Toro 112-6083 Also Replaces toro 112-6083 Pulley diameter is 5.75"