Salutations, I've been reading these forums for a long time from New Zealand, but just joined now to reply to this one, and apologies for being late into the discussion.

Interesting thread. Just to be a pain, I'm going to throw another factor into the mix (yeah, I'm one of 'those'). My Saph is on 225/35/18 Bridgeys all round (the 18" RS Sharkstooth alloy). Yes, as pointed out, they rub at the front, or they did.

By the time I got her, someone had replaced the lower suspension arm bushes with nolathane ones. Yes, there are many who would swear black-and-blue that that these are the business, but I'm not so keen. For one, they have a tendency to just implode, as opposed to 'wearing' - I have seen this several times first hand, whereby the bush is just 'gone', leaving very fine fragments of blue speckled all over the rim, and a lot of free-play in the front wheel. On the open road or under decent boost, this could be catastrophic.

Anyhooo, I gave these the flick, went back to factory-spec'd rubber bushes, and voila: the rubbing totally disappeared. Furthermore, she handles much better; in fact, it's almost like she is on rails.

Now I know, we're all running different gear, but I thought that this was worth noting. I chatted to my mechanic, who is very, very good, and we came to the conclusion that, as the Cos was engineered for such performance and many parts were engineered to operate with mere millimetres of 'play', something like a slightly different (not factory spec) bush can make that much of a difference.

Hope this adds another string to the thread (if that even makes sense