The present disclosure is directed to a flat wheel detector. The flat wheel detector may have a first sensor configured to be located adjacent a rail of a railroad track. The first sensor may be oriented at a first angle relative to a horizontal plane. The flat wheel detector may also have a second sensor configured to be located adjacent the rail. The second sensor may be oriented at a second angle relative to the horizontal plane. In addition, the flat wheel detector may have a controller in communication with the first and second sensors. The controller may be configured to receive signals from the first and second sensors. The controller may also be configured to detect a flat wheel on a railroad car based on the signals.