An adjuster unit (100; 200) for a vehicle disc brake (1;1'), in particular an air disc brake of a commercial vehicle, the disc brake having a brake caliper , the brake caliper preferably having a thrust piece (5; 205), a pair of brake pads , a disc positioned in between the brake pads , and the adjuster unit comprising: - an adjustment spindle (101; 201') adapted to be operatively coupled with one of the brake pads , and engage a threaded bore provided in the brake caliper such that by rotation in a first direction, the adjustment spindle (101; 201) moves the brake pad towards the disc , and by rotation in a second direction opposite of the first direction, the adjustment spindle (101; 201) moves the brake pad away from the disc ; - an actuator ring assembly (107; 207) that is rotatable about the adjustment spindle (101; 201); - a wrap spring (109; 209) that is helically wound around the adjustment spindle (101; 201) and operatively couples the adjustment spindle (101; 201) with the actuator ring assembly (107; 207) such that during rotation of the actuator ring assembly (107; 207) in the first direction, the actuator ring assembly and the adjustment spindle (101; 201) are non-rotatably connected to one another, and during rotation of the actuator ring assembly (107; 207) in the second direction, the actuator ring assembly (107; 207) rotates about the adjustment spindle (101; 201); wherein the wrap spring (109; 209) is positioned on the adjuster unit, in particular on the adjustment spindle (101; 201), to engage a stop (117; 217) upon rotation of the adjustment spindle (101; 201) in the second direction, causing the diameter of the wrap spring (109; 209) to increase, characterized in that the adjuster unit (100; 200) further comprises a support clip , the support clip holding the actuator ring assembly (107; 207) and being adapted to be non-rotatably mounted to the brake caliper , in particular the thrust piece , wherein the support clip engages the wrap spring (109; 209) upon rotation of the adjustment spindle (101; 201) in the second direction. - an adjustment spindle (101; 201') adapted to be operatively coupled with one of the brake pads , and engage a threaded bore provided in the brake caliper such that by rotation in a first direction, the adjustment spindle (101; 201) moves the brake pad towards the disc , and by rotation in a second direction opposite of the first direction, the adjustment spindle (101; 201) moves the brake pad away from the disc ; - an actuator ring assembly (107; 207) that is rotatable about the adjustment spindle (101; 201); - a wrap spring (109; 209) that is helically wound around the adjustment spindle (101; 201) and operatively couples the adjustment spindle (101; 201) with the actuator ring assembly (107; 207) such that during rotation of the actuator ring assembly (107; 207) in the first direction, the actuator ring assembly and the adjustment spindle (101; 201) are non-rotatably connected to one another, and during rotation of the actuator ring assembly (107; 207) in the second direction, the actuator ring assembly (107; 207) rotates about the adjustment spindle (101; 201); wherein the wrap spring (109; 209) is positioned on the adjuster unit, in particular on the adjustment spindle (101; 201), to engage a stop (117; 217) upon rotation of the adjustment spindle (101; 201) in the second direction, causing the diameter of the wrap spring (109; 209) to increase, characterized in that the adjuster unit (100; 200) further comprises a support clip , the support clip holding the actuator ring assembly (107; 207) and being adapted to be non-rotatably mounted to the brake caliper , in particular the thrust piece , wherein the support clip engages the wrap spring (109; 209) upon rotation of the adjustment spindle (101; 201) in the second direction. <EOS>