if i could reorder my car again, i would of gotten the 19's and then bought aftermarket 20's.
21's look awesome, however it comes with a heavy price.
1. They are fragle as hell, and i always have road anxiety actively hounding out potholes, and trying to avoid them to the best of my ability, because one bad pothole, and you will end up crying, especially since our cars do not come with a spare, and tesla only allows a x amount of days of loaner spare rental, unless you are getting the rim replaced / repaired though them. (tesla wont even repair them, they tell you get a new rim.)
2. Tires.... you have like 4 choices on tires... no kidding... compared to the millions on the 20's and billions on the 19's.
Did i mention they are always staggered on a 21, so you cant even rotate the tires.
That means, yes, most 21 inch owners will end up going though about roughly 1100-1500 dollars in tires every 2-3 yrs depending on how often you drive... or roughly anywhere from 7000 miles (P100D owners who have heavy feet
) to i hear some people streched that to 12000 miles... but anymore and your probably driving really really slow.
3. Ugh did i mention how stressful it is to always actively look out for potholes... sigh... especially on days that rain where the pot hole be filled with water, and you wouldnt know until it was too late....
4. Last to mention did note that it is also EXTREMELY stressful to drive on a roads you are not familar with when you see potholes as well, as you automatically go into pothole avoidance mode, and end up not having fun.
So my vote is 20's...
My friend has 20's on her 100D, and honestly her car rides better, she paid 875 dollars on 4 set of tires, and she easily went though 15k miles on them because she could rotate them.
But yes the 21's look very good, but IMO, not worth the extra headache and cost over life of car vs 20's.
So if cost of ownership is also a factor, i would stay with 20's where you have a larger choice in tires, a bit more comfortable ride, and less road anxiety on potholes.