Abstract: A walking frame (100) comprising a walking frame body (110) configured to provide support to a user as they walk across a surface, at least one swivel castor (120a. 120b) coupled to the walking frame body (110) and comprising a wheel (122) configured to contact the surface and rotate and a wheel mount (124) rotatable with respect to the walking frame body (110) to change the orientation of the wheel (122) relative to the walking frame body (110) and allow the user to steer the walking frame (100). The walking frame (100) also comprises an alignment mechanism (130) configured to apply a biasing force to the wheel mount (124) on rotation thereof to bias the wheel (122) into a predetermined orientation relative to the walking frame body (110), wherein the biasing force applied to the wheel mount (124) decreases as the wheel mount (124) rotates away from the predetermined orientation.