The application refers to a detachable tie bar (6) for a wheelchair (4), the wheelchair (4) being provided with two backrest posts (5), and the tie bar (6) connecting the two backrest posts (5), wherein the detachable tie bar (6) is provided with at least one operating lever (61 ). The application also relates to a tilting device (3) for a wheelchair (4), including seat bearers (13a, 13b) and cheeks (121 a, 121 b), being provided with a cavity, and wherein the seat bearers (13a, 13b) are hingedly connected to the cheeks (121 a, 121 b). The tilting device (3) includes a spring body (33), housed in the cavity of the cheeks (121 a, 121 b), and attached at one end to the cheek (121 a, 121 b) and at the other end hingedly connected to a link piece (35). The link piece is also connected to the seat bearer (13a, 13b).
