Rim Offset

[triracer67]

I'm looking to put 33x12.5x15s on my '67; it has 3.5" lift. How much offset do I need on the 10x15 rims so I don't hit the radius arms?

thanks!

 

[DirtDonk]

Tough one. Because with a 33, you might still hit the fenders if you try to completely miss the radius arms. Usually best to fit the fenders, then let the radius arm rub, or adjust the stops (and lose some turning radius of course) to keep them from rubbing on tight turns.

If the fenders are really cut big, or you are not planning to take it off the highway where suspension travel is used, maybe it's not such a hard thing to accomplish. And I'm sure others have actually done it, so will chime in shortly anyway.

But my feeling is for clearing the radius arms at full stop, you'd need a 10" wheel with 3.0" to 3.25" backspacing, and to clear the fenders best, you'd want in the 3 5/8" to 3 3/4" category. Even up to 4" if you can find them.
Not sure exactly how that will translate into offset, as that can vary by wheel design. But backspacing, when specified by the manufacturer, is a very easy tool to use on our rigs.

Good luck. Hopefully I'm getting old and am completely out in left field as far as them being mutually exclusive.

Paul