I have alum ones with no issues. The key here is quality...I have the BORA spacers. I know theres a guy out there somewhere that makes nice steel ones.Have any of you guys had any problem with the spacers causing vibrations. I read somewhere that the aluminum ones aren't so good and were giving people problems, and that the metal ones worked better.
I've been considering doing the same thing with mine. There are lots of "take off" wheels on the market right now.