New rear brake disc with speed sensor

I have made myself a new rear brake dis, so I can detach the rear wheel speed.  For me, this has the following advantages: the gear indicator and transmission calibration for the indicator are much easier with a powered wheel than with a towed wheel. The wheel has 40 test points (measured points), and weighs only 357 grams. The sensor screws directly onto the caliper mount, and the cable, like the brake hose, is determined by the swing- or rocker arm. It fits perfectly.