Hi, I've got a 2001 B5 RS4 and I'm wanting to get a spare wheel for it. I can't decide what size or style to go for. I know that my current original wheels are 18" x 8.5j with an offset of 20. Can I put an aftermarket wheel with an offset of 30ish and 8j width on or do I need to use the original size? Assuming that it would be to get me home and not for normal use. Yesterday I took a wheel off and it doesn't fit into the boot space due to a piece of trim and I was thinking the 8j may fit better. I reckon the 8.5j would fit if the trim was cut back a bit but not so keen to do this. Are there any space saver options? Interested to hear if anybody else has solved this problem. Cheers, Dave.