I'm using a standard
suspension setup on my GTS-T, and will have 255/55 rear (I think, they're in the bedroom and I can't bw a**ed to go look) and 235/45 front (I think, again). Tyres are Michelin Rallye2.
Shall see how they go on the standard height/ride, but I suspect, as WA1 says, that the wear will be uneven due to camber. Might get adjustable top arms sometime later in the eyar, but shall see what happens to these tyres first, as the standard 16" GTR rims n tyres are wearing fine at the mo.