who's Running 18 "s ?

Those that are running 18's, do any of you have the RMS AlterK? I'd like to run 18's but everything I've read says to avoid it with the AlterK. I know 17's will fit no problem, but I'd like a bit more wheel, plus the FR500's I want are more difficult to find in 17's.

I have the AlterK. I have never heard that 18's should be avoided w/ it. I can say first hand that is not accurate. If anything the opposite is true, because the 18's allow for more room for the steering tie rod, bigger brakes etc....