A wheelchair (10) has a chassis (11) with rear wheels (40) and front wheels (18) mounted thereto. A support (29) is pivotally coupled by pivot axis (31) to the chassis (11). A seat mount (19) is pivotally coupled to the support (29). An electric actuator (32) can move the support means to cause the seat mount to be moved between raised and lowered position. A clearance (14) is provided between one or more power supply units (13) and suspension mounts (15) to enable the support (29) to move therein during movement of the seat mount to and from the lowered position. The support (29) and actuator (32) are mounted by a mounting assembly (1la/34) which is mounted by guides (35) so that the mounting assembly can be raised by actuator (33) to further elevate the seat mount (19).
