I have gotten different answers on this question
I am looking at a 17x9 rim, it is offered in 2 different offsets
I know what backspacing and offset is, but not sure how they relate, and as I said I am getting different answers
OK that said the choices are: -12 offset and -25 offset
I was told that the -12 is 4.5 bs, but -25 I am getting everything from 5.5-4 bs
I think the 4 bs is correct, but just want to be sure.

also would you go with 4.5 or 4 bs with 35's? pros and cons?

 

To convert offset to backspacing (assuming negative offset )
(Wheel Width +1)/2 - (offset * .03937)


-12mm offset = (9 + 1) / 2 - (12 * .03937) = 4.5" backspacing (rounded slightly)

-25mm offset = (9 + 1) / 2 - (25 * .03937) = 4" backspacing (rounded slightlY)

 

Thank you, the 4" made more sense than the 5.5", just double checking myself

 

it all depends on the look ya wanthow far ya want the tires too stick out i would go with the 4"