Type/size of RUCA's should I use?

[matzinm2]

Hello everyone, well the time has come to choose my coilover/RUCA setup for my 13 hatch. I was gonna do a PBM setup, first of all, I bought these Takata Green Work cr-kai's from Mark Arcenal of fatlace: http://royaltiger.wordpress.com/2009/08/12/fatlace-s14/ THANKS MARK! Anyway enough name dropping, in short, they are huge, 18x9 in the rear with 245s and I believe 18x9 in the front with stretched 225s. I do NOT know the offset as they are not with me for the time being. I'm gonna be running Stance LX+'s. Anyway, my question is, with a nine inch rear tyre ,should I get a 50mm RUCA? I'm looking for you dudes running huge rear tyres who have rucas, what length etc?

Thanks for the help yo!