The present disclosure relates to improvements in load carriers mountable on the rear of a vehicle. Furthermore, the present disclosure relates to load carriers having a load support arrangement which may be moved between a use position and a non-use position. The present disclosure also relates to configurations of a base frame for a load carrier, a tightening mechanism for mounting a load carrier on a vehicle, an arrangement for mounting a load support arrangement on a non-round cross beam of a load carrier, an attachment device for coupling a force transfer member to a mounting portion on the vehicle, a specific configuration of a coupling mechanism for supporting a vehicle coupling portion of a load carrier on a vehicle, and a spacer for guiding a force transfer member around damageable parts of a vehicle such as a spoiler.