I'm running 16x8's with 4" backspacing and 285/75 R16's. There is probably about a good inch or two before the very edge of the guard. So I imagine that with 4.75" BS you will have a bit of overhang. The overhang is just noticable with mine, but then again, my tyres aren't 12.5" wide. I'd go 4" BS with 12.5" tyres.
Attached a photo. If you look at the rear tyre you can get an idea of how far in it sits.
Last edited by Mud'N'Guts; 30-10-2010 at 06:48 PM.
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