Measure with the help of modern tachometer revolutions of the highest speeds.
However, this often dependent on appropriate lighting conditions, so that measurements on, for example, to bright conditions may differ.
Let yourself be so with the help of this brilliant reflektortreifens not restrict.
Even a small piece attached to the body of your torque is sufficient to make your measurements through the reflection function of the strip can be seen in such a way as possible.
This text is machine translated.