Abstract: An apparatus for controlling the tilt range of a chair and the resistance to tilting of the chair including a torsion spring mounted to an axle, a tilt rate adjustment mechanism, a forward tilt limiter and a rearward tilt limiter. The tilt rate adjustment mechanism includes an outer sleeve member mounted to the spring. An arm extends radially outward from the sleeve and operably engages a block member threadably attached to a screw. A first and second gear member are actuated to rotate the screw so as to move the block member which thereby moves the arm a desired amount to adjust the initial return torque of the spring. The forward tilt limiter includes an arm extending outwardly from the axle. The arm operably engages a pivot member pivotally attached to a tilt control housing. The rearward tilt limiter also includes an arm extending outwardly from the axle. The arm operably engages a cam member pivotally attached to the tilt control housing.