It depends on exactly which car you are comparing. The Tesla Model 3 is somewhere around 3500 lbs, isn't it? That's pretty average for a car these days.

And there are plenty of big SUVs that have a similar weight to the heavier EVs.

Besides, you can't assume that electric cars use the same tires as non-electric ones.

There is a huge range of tires out there from extremely long wearing ones to sticky ones that last a fraction of the time.