Quote:
Originally Posted by CC69Rat
So -- in this example, the 8.5" wheel Where I have the narrow axle housing, I'm running 4.75" backspacing. (check my stepper build thread if you want to see) Because the 72 axle housing is wider, you'd need to offset this difference in the wheel. Ex. .. the wheel sits BACK further under the truck but it takes away the lip you see on the outer edge. So, your combo would be around 5.5" BS.
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CC69Rat, I appreciate all the details, that's the kinda guy I am, and I follow you so far.
Let me ask it to you this way, from what I can tell you have the narrower axle and an 8.5" wide rim with a 4.75" backspacing on a stepper. So beings I have the wider axle, if all else remained the same as your, would I rub the OUTER fender? That's the way I'm reading this.
Converting offset to backspacing from
a place like this tells me that the 9.5" wheels with a 15mm offset is equal to a 5.09" backspacing...which is MORE backspacing than you are currently running. This would pull the inner lip back towards the inner bed by 0.34" effectively cutting in half the 0.75" width difference that my axle has on each side compared to you. If that's the case I would basically be within 1/3" of the inner rim lip being exactly where yours currently is (I'm guessing that wouldn't cause a rub issue). BUT because my 9.5" is wider than your 8.5" I might be out to far and start hitting the OUTER edge of the fender. I'm my math is right I would then be 0.66" closer to the outer fender edge than you currently are.
So to simplify it, if you were to guess, could your current wheels be 0.33" closer to your inner bed side AND 0.66" closer to the outer fender edge without rubbing anything? Sorry for the longwindedness, I just needed to type it all out so I could make sense of it myself.