(props to Andrew Batiuk)
Whether this is standard or an optional accessory is anyone's guess, but I have a funny feeling these may be the standard base setup in order to be able to get the maximum EPA range rating.
However as we've seen in earlier pics, the underlying V-spoke wheel is quite pretty on its own, so for those who aren't hyper milers or just don't want the Space 1999 look it should be a simple affair to ditch them. Whether Tesla will offer a smaller five-finger lug cap for the V-spoke like the ones seen on the Alpha (and presumably what will be standard on the 19" swooping V) remains to be seen. If not, I'm sure we'll hear the aftermarket firing up the CAD software...