I think we differ in our perception of "small" and "mid-size" car.
But even so, 195 kg is the weight of a driver and passenger. If we consider this to be a decisive factor in pollution, we had better also consider the obesity epidemic as a factor in tire wear. ^_^
One possible explanation is that I live in a different market. In any case, the weight comparisons are the real data to use. The Nissan LEAF is heavier than some cars, but much lighter than the most popular ICE-V choices being made by consumers.
But even so, 195 kg is the weight of a driver and passenger. If we consider this to be a decisive factor in pollution, we had better also consider the obesity epidemic as a factor in tire wear. ^_^