Yes. It is the length, between intersections, of a line segment which intersects both the centreline of the brake centre bolt and the centreline of the pad bolts orthogonally. As such, it is also the shortest possible line segment which is bounded by its intersections with these two reference lines.
Yes. It is the length, between intersections, of a line segment which intersects both the centreline of the brake centre bolt and the centreline of the pad bolts orthogonally. As such, it is also the shortest possible line segment which is bounded by its intersections with these two reference lines.