A joint assembly (102, 104) usable on an external fixator device and structured to position a component through different adjustment modes, said joint assembly (102, 104) comprising: a primary adjustment assembly configured to be connected in adjusting relation to the component, said primary adjustment assembly disposed and structured to movably adjust the component through a first range of motion, a lock assembly positionable into and out of movement restricting relation to said primary adjustment assembly, a secondary adjustment assembly disposed and structured to movably adjust the component through a second range of motion, and said first range of motion representative of a gross adjustment mode of the component and said second range of motion representative of a fine adjustment mode of the component, characterized in that said primary adjustment assembly comprises a base and an adjustment member, the component being configured to be connected to the base and movable therewith, said primary adjustment assembly further comprising a cam assembly (118, 120) disposed in movable interconnecting relation between said base and said adjustment member, forced movement of said adjustment member defines a forced movement of said base and the component, via said cam assembly (118, 120), through said first range of motion, said primary adjustment assembly further comprises a first gear movable with said adjustment member relative to the component, said secondary adjustment assembly defining at least a portion of said lock assembly and including a second gear, said second gear being movable into and out of mating engagement with said first gear, said mating engagement between said second and first gears (116, 122) defines said movement restricting relation of said lock assembly with said primary adjustment assembly and the component, and driving, meshing engagement of said second gear with said first gear comprises said second range of motion and said fine adjustment mode of the component. a primary adjustment assembly configured to be connected in adjusting relation to the component, said primary adjustment assembly disposed and structured to movably adjust the component through a first range of motion, a lock assembly positionable into and out of movement restricting relation to said primary adjustment assembly, a secondary adjustment assembly disposed and structured to movably adjust the component through a second range of motion, and said first range of motion representative of a gross adjustment mode of the component and said second range of motion representative of a fine adjustment mode of the component, characterized in that said primary adjustment assembly comprises a base and an adjustment member, the component being configured to be connected to the base and movable therewith, said primary adjustment assembly further comprising a cam assembly (118, 120) disposed in movable interconnecting relation between said base and said adjustment member, forced movement of said adjustment member defines a forced movement of said base and the component, via said cam assembly (118, 120), through said first range of motion, said primary adjustment assembly further comprises a first gear movable with said adjustment member relative to the component, said secondary adjustment assembly defining at least a portion of said lock assembly and including a second gear, said second gear being movable into and out of mating engagement with said first gear, said mating engagement between said second and first gears (116, 122) defines said movement restricting relation of said lock assembly with said primary adjustment assembly and the component, and driving, meshing engagement of said second gear with said first gear comprises said second range of motion and said fine adjustment mode of the component.