A vehicle-mounted equipment carrier includes a hub portion to which is secured a number of vehicle-engaging and equipment-engaging support members. The various support members are each connected to sections of the hub that are movable relative to one another and that include engagement structure to hold the hub sections in desired angular positions with respect to one another. The hub sections can be moved upon disengagement of a clamping mechanism that compresses the hub sections into engagement with one another, and also holds each of the various components of the carrier in connection with one another.