responding to someone's post last page.
the wheels are not "angled" inwards on the top, that's call camber. and the camber angle is adjacent to the strut. the strut assembly is adjusted either from the top strut mount or via the lower control arm.
a bigger wheel will not "extend" more towards the top of the strut and touch it. Only width and offset of the wheel OR the thickness of the tire may cause a hitting on the inner strut.
Best fitment for tesla is most likely going to be as follows:
20 x 9 et35 front, 20x10.5 et35 rear. This will easily accommodate a 245/40/20 front and a 275/35/20 rear which is more tire than it really needs. Anything over 275 section is expensive as hell as replacement and offers no real benefit.
- - - Updated - - -
Also! If you're looking for weight saving, the OEM 21 wheels are ridiculously heavy from the start.
Any forged or flow form wheel will save you 10 - 15 pounds of weight, CF is sort of overkill in terms of value for dollar.
My flowform AG M621 Wheels at 20x10" weighs in at 27 pounds. Cost $600 a wheel. More than enough weight saving to be noticed and much safer to drive on than $1000 a wheel.
For fun, here is a picture of my friend's Half CF wheel (more cosmetic than functional of course)