Has anyone had experience building their own spare for the F30 / F31? I’m looking to build a spare for my 2016 F31 328ix. The catch is that with the M Sport calipers, the 17” rim most use will not work. I’ve read that the 18” spare alloy wheel (36116796147) for the F01/F02 & F25, will work if fitted with a 145/70 R18 tire. I can only find two manufacturers for this tire size, Maxxis and Yokohama. Never had any experience with either of these brands, but then again, this is a spare, so maybe that’s a good thing. Even though I have the mobility kit, I would rather a real spare for longer road trips.