1) i’ll get you a picture but basically it looks just like the 21s except they’re smaller.
2) no, I decided to keep the same size tires on all four wheels. I did this for several reasons: first, the tires can now be rotated. Second, the M3P wheels are .5 inches narrower, so it seems like a good idea not to play with trying to put larger tires on the rear.
3) The ride quality is a day and night difference. Granted, I put the OEM 20in tires on the car… but they seem to ride pretty nicely, even if they are not the best tires on the planet. (I did get 30 miles more range out of the car though.)