Abstract: The invention relates to a device and a process for measuring the position of a first axis in relation to a second axis, in particular for measuring a bicycle frame having a steering axis which, in the desired state, lies in a main plane of symmetry and has a second axis which, in the desired state, runs at right angles to the main plane of symmetry, for example a swinging arm axis or a bottom bracket axis of a bicycle frame. The device or process includes measuring bodies being fitted to the first axis to be measured and two image recording devices, in particular CCD cameras, which are spaced apart from each other in a fixed spatial relationship to the second axis and aligned with the measuring bodies. The evaluation is carried out by means of known methods of photogrammetry and a computing unit.