Quote:
Originally Posted by cwylie
So I called Baer and their brakes do not offset the wheel mounting surface to their knowledge. The wilwood kit I have adds .38 inches of offset per side. So with that being said my wheels at 18x9 5.25 backspace should actually sit .12 further inside than the 18x10 5.75 backspace ride tech recommends.
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.38 per side do you mean 9/16 of an inch per side? from this
conversion chart, that means the brakes push the wheel outward 9/16 of an inch per side and then you ran a rim thats .500 thousandths (or 1/2 wider offset than recommended) so 9/16 + 1/2
Find the lowest common denominator
* 1/2 by 8
= 8/16
Now you can add them both together since you have the same denominator
9/16 + 8/16 =
9+8 = 17
17/16 =
1 1/16
so your 1inch and a 1/16 too wide on your wheel and brake selection, on your car with the added brake dimension you stated I would have recommended about a 6.00 back space
lets use a 10 inch rim for example
5.25 back space would stick OUTWARD .500 thousands (1/2 inch) more than a 5.75 back space
hope this helps