What offset to fill 2" psi flares?

[2doorfiend]

Howdy,

I cant find which member or thread I was looking in before, so I'll just make a new one.
I saw one member had the PSI-restyling 2" riveted fender flares. I liked them so much that I ordered them as well... but they look a little goofy over the stock rims.
I have a lift on the way, and I'm trying to decide on which rims to buy. I want to go with 18" but I'm not sure on the width or offset. Im also going to go with around 33" tires.
The rims I have looked at so far are all around -12mm offset and 9" wide, which doesn't seem like much, I tried to do some (very rough) measuring and I don't think that will be enough to at least sit flush with the new fender flares. Hopefully someone knows more about the measurements and can tell me what I need, or at least give me an idea. What offset do you guys have?
Thanks

 

[YAMBAG]

I put 20x10 wheels on my Tahoe with a -12mm offset and they sit flush with the OEM flares. I would go with at least a -24mm offset on a 10" wide wheels if your flares are wider than the stock ones

 

[2doorfiend]

thanks, that's exactly what I was looking for