I'm a big fan of the style of the 19" standard wheel for the model S. I'd love a version in 20 or 21" for the X but if the model S reference applies to X, once you go to the larger size wheel, all the rims jump to a more conservative 10-spoke look; essentially losing that muscle sport appeal.
I think it would be great to have a mag available in 20/21" on the Model X. This will help the X keep a mean stance. It would be a bummer to pay for the signature series and how to 'downgrade' to a 19" wheel to get the more sporty look.
Other's agree? Would be curious if any Model S owners have experienced the difference in ride quality between 19, 20 and 21" wheels as well.
#659 for Model X Signature