I'm selling my current E92 space saver spare I put together with my car so will need to put together another one. I know the lug bolts have increased to 14mm, but what is the hub diameter (E92 was 72.6mm)?
For reference, here is the E92 thread I started on building up a spare which should be a good starting point. The one I did was slightly smaller in diameter than stock; there are other options now:
http://www.m3post.com/forums/showthr...ce+saver+spare