Seems like closer the weight was of the stock 255/45r19 tires which is around 25kg per wheel better the results were.

Lighter tires got worse results.

So based on this test method narrower tires don't work better for this kind of smooth shaking test. On the road the 195/60r18 have been much more comfort oriented than stock 255/45r19 tires.

We haven't yet tested many of these sizes on the road as weather is not great for testing. Not all will be tested on road. Always windy, rainy and temperature is not staying constant.