Right, cheers for the help guys.
I am going to return the wheels.
I am looking for a nice flush fit either 18” or 19”
So 19” wheels I would want 9” wide and 48et
What would you recommed for a 18” wheel.
Thanks again
My 19s are 9" wide with a 48mm offset which puts the outer edge of the front rim 10mm in from the outer edge of the wheel arch.
Your rim will sit 21mm further out than mine. ( 1/2 inch extra width rim dived by 2 = 6mm plus the difference in offset between 48mm and 33mm = 15mm. Total 21mm ).
So in real terms, your front rim will stick out past the wheel arch by 11mm.
255 tyres will also look slightly stretched on a 9.5" wide rim.
255 tyres sit about perfect on 8.5" wide rims giving a nice square profile and a degree of rim protection.
A lot of suppliers fit 275 wide tyres on 9" and 9.5" wide rims.
So I have found some wheels 18”
They are 9” wide and offset of 38 so that would make them flush with the arch going by your calculations. Sorry again.