Tandem bicycle, has frames connected with one another by square tube and connected with bracket through folding of bottom bracket tube at lower end of one of frames, where frames are locked in positions by quick clamp

摘要

The bicycle has frames (RA, RB) arranged telescopically in single or two-seat position by a hinged treadle drive. The frames are connected with one another by a square tube and connected with a bracket through folding of a bottom bracket tube (C) at a lower end of one of the frames (RB). The frames are locked in the positions by a quick clamp (SSP 6). A bottom bracket (TLA) and a rubber holder (GH1) are arranged at one of frames (RA). A holder (H) is arranged at a rear upper end the frame and provided for accommodating a saddle and/or steering wheel combination.