Originally Posted by
Iride01
There is a small screw that determines how far on arm of the caliper will be from the rim. Then once they are equal, you just adjust the barrel adjuster or the position of the cable in the pinch bolt to get both at the correct distance from the rim.
That "centering screw" is not needed for dual pivot brakes. Assuming the pivots aren't dirty or binding, all you do is adjust the cable length to get a proper pad separation, center the caliper over the rim by hand and snug down the mounting bolt. If one arm is binding check it's mounting bolt to the caliper and/or lubricate the pivot.