Hi all, I bought a set of BBS 17in style 42's last winter but only popped tyres on this month. (8J Et 47) My E36 came from the factory on 16in style 42s (7.5j) and what appear to be 5mm spacers. I fit one of the new wheels without the spacer last week but it was making a low metallic rumbling sound at 5mph. I didn't use the spacer as it seemed to me that there wasn't enough of the centre hub ring thing exposed to mount the new wheel to. What am I doing wrong? I am clueless when it comes to wheels etc. Shorter lugs? Plow on with the spacers?