Big brakes, like Stoptech, won't fit under my BBS wheels, so I am considering the H&R wheel spacer/adapters. Good idea? Bad idea?

....the fender?

I could get by with a 15 or 20mm.

...Here's an article on them from European Car magazine.<ul><li><a href="http://www.europeancarweb.com/features/0601w_spacers.shtml">H&R Trak+ Wheel Spacers</a></li></ul>