If you have opted to replace your run flat tires with regular tires you (like me) will be scrambling to find a compact spare. Having no luck finding anything used in Canada, I ordered a 17 inch compact spare tire alloy rim (BMW part number 36-11-6-796-144. I bought it in the US from getbmwparts.com for $ 175. Then I bought the compact spare tire from Tire Rack. Tire is Khomo 135/90 17. Cost was $92. Overall not cheap, but it works.