A convertible item of furniture including: a plurality of shelf units, wherein each shelf unit has a horizontally extending leave and at least one leave support for supporting the leave; a drive system operably connected to each leave support such that the leaves remain horizontal when the shelf units are moved between a vertical configuration and a horizontal configuration; and, an anti-tip leg system. The anti-tip leg system has a front leg assembly and a rear leg assembly including an upwardly extending pair of rear legs, each rear leg comprising a rear leg upper region operably connected to a shelf unit or a part of the drive system, and a rear leg lower region supporting at least one wheel, and a linkage assembly interconnecting the front and rear leg assemblies. A spacing between the front and rear leg lower regions increases as the shelf units move towards the horizontal configuration.