OFFSET

What offset is needed for an 18x8 on a 90's model mitsu ?

I am not sure on an 8 but my 18x7.5 was a +40 my 20x7.5 is now a +45

Thanks man my cousin just bought some wheels off e-bay and they are a +25mm offset and we're not sure how much to get them machined. They don't need much but we don't want to go to far or they will rub the control arms.

18s should clear the control arms

I know escalades wil tuck on a mitsu, and they are +37 17x7.5. Using this information, 18x8 will need another 1/2 inch off offset to have the same frontspacing, or about ~+50mm offset. So IF there is enough meat in the stud bores, you'll need to take off about 25mm of material, or almost an inch. Something tells me though, you wont be able to take off that much because the lug not counterbore will be too deep.