[Plasmoid2000ad]

I think it's emissions and range rankings. When you are trying to shave off every last bit of weight to get your car into a lower emissions class, the spare wheel looks like a waste. Why not leave it out, the owner can always put it back in if the really want.

In Europe, the automakers are really getting card into Emission bands by the smallest possible margins, and as this effects tax buyers do care.

For EVs it's range - buyers pay a lot of attention to the headline range figures and a spare wheel plus the tire is not going to help.

[_ea1k]

The effect of a spare on range would be so miniscule as to not matter, tbh. Well, unless it was mounted outside the car for some reason. Some of the designs for mounting them on trucks might have an impact.