Abstract: A traction device for a vehicular tire mounted on a wheel with a gripper tread with a plurality of small protrusions on the inner surface thereof make limited penetration into the tire tread to prevent radial or circumferential slippage of the traction devices about the tire. Larger protrusions on the outer surface of the gripper tread provide improved traction in mud, snow or sand. A pair of side arms, attached to ends of the gripper tread in a spaced apart, opposed relationship and at substantially right angles to the surfaces of said gripper tread, secure the traction device transversely about the tire by resilient engagement with the sidewalls of the tires, hooking cooperation with clips secured between the wheel rim and tire bead, or wedging connection between the brake drum flange and wheel.