ROTOR 2INpower 3D+ dual sensor

The Rotor 2INpower uses four pairs of opposed strain gauges in its power meter, which it says cancels the effect of temperature changes, so that there’s no need to calibrate after the initial set-up.

There are four strain gauges placed in the axle to measure left leg power output and four in the right crank for the right leg.

Rotor 2INpower measures angular velocity around 500 times per rotation using an accelerometer, unlike some of its competitors which only measure at one or two points in the cranks’ rotation. This allows a much more detailed analysis of pedalling dynamics – particularly important if using its Q-rings.

You can also connect the meter via BlueTooth smart to a tablet, which will allow you to analyse your pedal stroke. Something Rotor suggests is useful for working on technique and eliminating deadspots. In our experience, independent right/left leg power can be especially useful for riders with a history of single leg injuries.