help with offset please

[irish_delica83]

i need some rims for my new 30x9.5x15s herc T.D.M.T. s says i should have 7.5 rim. Im looking at 15x8s and 15x7s, what offset do i need do i just add an inch to the 25mm-30mm it says on wiki on the stock wheel for every inch the wheel gets wider?

[jessef]

depends on how much you want the wheel to stick out.

http://www.delica.ca/forum/backspacing-2542.html

15x7's are fine for 31x10.5's. It's what 80% of toyota/jeep owners use.

The difference between the crown/rubber meets the road between 15x7 and 15x8 is very small.

If I had a choice and preferred the 15x7's, I would choose the 15x7's.

Will depend on the backspacing as well.

I have 15x8 with 3.75" backspacing which pushes the whole rim/tire outwards a touch too much.

15x8 with 4-4.25" backspacing is perfect for the Delica.

15x7 with 3.75 - 4 " of backspacing is perfect as well.