I'm installing a 65 12 bolt in my 70, it's about 2" narrower. I have stock original 15x7 rally wheels, seem to be about 4.25 offset. Looks like they'll fit OK, little close on the inside. So, I want to move to 8" rims, (reason why I went to the narrower axle in the first place)I see a lot of them are 4.5--4.75, but Wheel Vintiques has Series 30 15x8 with 4" offset, $70, is this about right? see http://www.wheelvintiques.com/cat2002.PDF , which is a large .PDF Acrobat file. A little further down the page is the Series 38 multi-bolt-pattern 15x8 4 off, it's only $50. Any good reason to not to save the $20/wheel?

I think what I really need is a 3" offset, but nobody has it that I can find. But when I think about it, it seems like 15x8x4 is like what I have, but all the extra wideness is to the outside, which is what I need, right?

Opinions, guesses, laughter, smart remarks, all are welcome.

Tom

The difference in width between early and later rear ends is exactly 1", 1/2" per side. If you go with the 4" offset you will be fine.

Steve R

Do you mean offset or backspacing?

Backspacing and offset use different wheel width dimensions (just to make it easy for us).

For example, a 15x8 with 0 offset has the mounting pad (the side that contacts the drum) in the center of the wheel. This wheel will have 4.5" backspacing, and 4.5" frontspacing. I know that adds up to 9", but back/frontspacing measurements include the 1/2 lip on the rim (the part the weights are on).

Negative offset means that more than half of the width (8" in this case) is towards the fender. That is a 15x8 with 1" negative offset will have 3.5" backspacing and 5.5" frontspacing.

Hope this helps.



[This message has been edited by Glenn1018 (edited 09-11-2002).]