A convertible item of furniture comprising: a front end and a rear end; a plurality of shelf units, wherein each said shelf unit comprises a substantially horizontally extending leave and at least one leave support for supporting the leave; a drive system operably connected to each said leave support such that the leaves remain substantially horizontal when the shelf units are moved between (1) a substantially vertical shelf configuration and (2) a substantially horizontal configuration; and, an anti-tip leg system. The anti-tip leg system comprises: a front leg assembly comprising at least an upwardly extending pair of front legs spaced apart from one another, each said front leg comprising a front leg upper region operably connected directly or indirectly to a shelf unit or a part of the drive system and a front leg lower region supporting at least one wheel; a rear leg assembly comprising at least an upwardly extending pair of rear legs spaced apart from one another, each said rear leg comprising a rear leg upper region operably connected directly or indirectly to a said 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 substantially horizontal configuration; the spacing between the front and rear leg lower regions decreases as the shelf units move towards the substantially vertical shelf configuration; said front and rear leg lower regions remain in contact with a ground surface at all times; and, said linkage assembly determines a maximum spacing allowable between the front and rear legs.