Did anything ever happen with this?! It seems like there is enough around, every day I see one or two i3's buzzing around my area, Tatum and Shea.
I have an i3 with 20" wheels, I am looking for somebody local who is interested in a wheel swap, one of us would end up with four of the 5" wide wheels, and the other would have four of the 5.5" wide wheels (you need spacers to run the 5.5 in front). I don't really care which I end up with, I just want the same size wheels so I can have the same rubber all around and rotate them to even out the wear.
I looked into buying 2 more wheels or one of the sizes and just storing the others, but they are a bit spendy!