A rail vehicle includes a chassis, a vehicle structure and a support unit disposed at the end face of the rail vehicle. The vehicle is comparatively lightweight and economical and can also advantageously perform other tasks in addition to supporting a track reamer. The support unit includes a plateau section which is part of the vehicle structure and includes a climbing protection device on its end face and a track reamer holder for supporting a track reamer. The track reamer holder is disposed below the plateau section and is rigidly secured thereto.