Abstract: A tank assembly is configured for attachment to a mount of a tire carrier of a vehicle. The tank assembly includes a hub reservoir and a flange reservoir. The hub reservoir radially surrounds a central axis and is configured for connection to, and being supported by, the mount of the tire carrier. The flange reservoir extends radially from the hub reservoir about the central axis. The hub reservoir and the flange reservoir cooperate to define a cavity which is configured for holding a volume of fluid.