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These will hang out the guards like 20mm, stick with 42-30P offsets on the front and 30P rears
The wheels I have on now are 17x8 +21 and they are fine, I actually would even say a little more poke is needed. 8.5's might be a bit more difficult though.
The 42-30p offsets for cars like the VX and onwards dont fit the Calais properly, the rears scrub on the inside of the guard and the fronts sit too far in and look stupid.
VP/Q IRS rear hubs are different to all of the later ones which means offsets that work fine on a VP won't on a VR onwards (and visa versa).
Yeah I have a pair of VR/VS Trailing arms sitting in the garage because I know you can easily swap them out to bring the wheel offsets back into line with the rest of the commodores but whenever I fit VX etc wheels the fronts just dont look right in the guards, they sit too far in. I've test fitted WH Grange 18's and VT GTS 18's and they just dont look right on the front. Does anyone know if the front brake hubs are at all different throughout the models, that could explain why they sit too far in?
The 21p offset wheels I have on now are really good, they fit fine and look right but they're 17s which I think are a tad too small. I want 18s.