Originally Posted by
PaPa
Whether you pedal an IGH or not during shifting, is irrelevant. What is relevant, is how much 'load' or 'torque' you apply to the pedals during shifting that matters. Mating gears don't like to move laterally when their teeth are loaded, so simply backing-off the pedal pressure is enough to appease most gearboxes.
This is my experience, too. I had a Sachs 3x7 on my V-Rex for a few years. I was advised to stop pedaling to shift the IGH, but in reality spinning slowly under no-load worked just as well. The feet didn't have to completely stop as long as there was no force being applied.