link to tire comparison https://photos.app.goo.gl/7VQpGpAzPZtWG29T7
link to new spare tire https://photos.app.goo.gl/P7JiygZaxr8ioASE7
I just bought a spare tire for my i3 (ecopia tire/aftermarket wheel). I tried to buy a used wheel/rim at ebay but they cost more than the brand new rim...