[GOAT8U2]

It looks like a 15x10 with a 5.5" backspacing would work with a 325/50/15.

I currently have a 28x12.5x15 MT ET Street on a 15x8 with a 4" BS and there is a bunch of room towards the frame. Here is what my numbers come up as.

There is 2.25" of tire bulging past the 15x8's lip on each side on the 28x12.5x15.
That means with a 4" BS on both sides you get 6.25" of tire towards the frame and 6.25" towards the fender lip.

325/50 is 28x13x15 on a 10" rim would have 1.5" of tire bulging out each side.
Since I don't want to get closer to the wheel well lip I don't want that side to go past 6.25".
So 6.25 - 13 = 6.75" must go towards the frame.

A 5.5" BS with the 1.5" tire sticking out is 7" and a tad more but that seems fine since it gives me a tad more fender lip clearance.

Just seeing if anyones worked this out, I found one post with a 325/50/15.

[wytnyt]

b-man has made some excellent posts about wheels and fitment.
search his posts and youll find answers to whatever you need answered
he is the wheel guru

[cutrone]

I have a 15x10 5" backspace w/ 325-50-15 et radial in my garage, your more than welcome to use it for mock up. I'm in the south burbs.