Ignore Rick, and ignore the gay thoughts about 9s!
Ive driven a good few 33GTRs with 10s and 10.5s all round, all with 265s or 275s on them, and they perfectly fine, bollocks to the tramline theory.

Pics of my car, well, they not the best, stock ride height etc, but this is 10x18 ET30 on a 32, ie much smaller than a 33.







Looking at the pics, i blatantly shouldve went ET20-25 even on the 32! WAY too far inside the arches for me...

33GTRs have more room, so always need at leat 10 lower offset, so no wonder they all run ET15-20 on 10s, as anything else would be proper gay.

If you was on about 9s youd be pushing on negative offset to fill the arches properly...