A reversible seating mechanism configured for a conveyance, in particular in form of a stroller or wheelchair, comprising a frame; a cross member pivotally supported on the frame and extending between end frame supports; a seat mounting plate pivotally supported on the cross member and configured to support a seat on the surface thereof; and a tilt limiter configured to restrict movement of the seat mounting plate, characterized in that, • the cross member is a tubular element that has a shaped profile that selectively interacts with mating shaped profiles in order to restrict or limit rotational movement of the cross member relative to the end frame supports with the rotational movement being in a plane generally parallel to the end frame supports about an axis to define a tilt angle, • the seat mounting plate has a rotation release lever to permit the seat mounting plate to be selectively rotatable about a further axis for rotational movement in a plane generally parallel to the cross member to define one of a forward and rearward facing orientation, wherein the seat mounting plate is secured to the cross member by a turntable clamp assembly, and the turntable clamp assembly secures the seat mounting plate to the cross member for concurrent tilt movement about the axis, with the mounting plate being oriented to the tilt angle, and • the tilt limiter is configured to restrict movement of the seat mounting plate between the forward and rearward facing orientations until the tilt angle is adjusted to a preset angle. a frame; a cross member pivotally supported on the frame and extending between end frame supports; a seat mounting plate pivotally supported on the cross member and configured to support a seat on the surface thereof; and a tilt limiter configured to restrict movement of the seat mounting plate, characterized in that, • the cross member is a tubular element that has a shaped profile that selectively interacts with mating shaped profiles in order to restrict or limit rotational movement of the cross member relative to the end frame supports with the rotational movement being in a plane generally parallel to the end frame supports about an axis to define a tilt angle, • the seat mounting plate has a rotation release lever to permit the seat mounting plate to be selectively rotatable about a further axis for rotational movement in a plane generally parallel to the cross member to define one of a forward and rearward facing orientation, wherein the seat mounting plate is secured to the cross member by a turntable clamp assembly, and the turntable clamp assembly secures the seat mounting plate to the cross member for concurrent tilt movement about the axis, with the mounting plate being oriented to the tilt angle, and • the tilt limiter is configured to restrict movement of the seat mounting plate between the forward and rearward facing orientations until the tilt angle is adjusted to a preset angle. • the cross member is a tubular element that has a shaped profile that selectively interacts with mating shaped profiles in order to restrict or limit rotational movement of the cross member relative to the end frame supports with the rotational movement being in a plane generally parallel to the end frame supports about an axis to define a tilt angle, • the seat mounting plate has a rotation release lever to permit the seat mounting plate to be selectively rotatable about a further axis for rotational movement in a plane generally parallel to the cross member to define one of a forward and rearward facing orientation, wherein the seat mounting plate is secured to the cross member by a turntable clamp assembly, and the turntable clamp assembly secures the seat mounting plate to the cross member for concurrent tilt movement about the axis, with the mounting plate being oriented to the tilt angle, and • the tilt limiter is configured to restrict movement of the seat mounting plate between the forward and rearward facing orientations until the tilt angle is adjusted to a preset angle.