Hi guys, im new to this site since i recently purchased a 2006 sv6 vz. It came with genuine cv8 monaro 18" rims, 235/40R18's all around. But for me thats just not big enough :P My mate has a VE ss ute with 245/30R20's on the front and 275/30R20's on the back. They are the new Holden pentagon...