Abstract: A wheeled device for enabling a scuba tank or the like to be moved overground, instead of the user having to carry it, this device having an elongate axle, adjacent each end of which a wheel is rotatably amounted. A pair of tank-engaging members are utilized in connection with the axle, such members being movable between a nested position, in which the members require minimum storage space, and a position in which the members are separated to a limited extent. One of the members has a support platform for supporting a scuba tank, and each of the members has a sidewall-engaging portion for engaging the sidewall of a scuba tank inserted between the sidewall-engaging portions, to rest upon the support platform. Thus, when the scuba tank is resting on the support platform of the one member, the sidewall-engaging portions of both members tightly grasp the sidewalls of the scuba tank, such that the wheeled device does not drop off should the user lift only the scuba tank.