Could the sensor not on the side of the disc brake mount the distance between sensor and magnet was too big. Therefore had to switch to the right strut and move the sensor relatively deep, just like the magnet, so that the distance between the two was low. The cable goes without problems if you do not want it mitverlegen with hydraulic cables. I am as I have fixed it, very satisfied. Have the speedometer set and lo and behold, +/- 1km / h Deviation from GPS Speedometer Garmin. In other words, correctly set the speedometer runs far more accurate as most car speedometers which have a tolerance of +5 km / h have. Even riding in the rain 2 has coped without problems the speedometer.
5 stars would have given it if the sensor and the transmitter / magnet would have been so strong that it had worked well on the left leg.
I like to buy again, for the price, definitely a recommendation!