BMW wheels on my 69....help!

[4086D9]

OK...I searched and founds lots of info! But had some questions. The wheels I like are 18x8.5 and 18.9.5. They come in 20mm offset.
The tires I just picked up are 245/40/18's front and 275/40/18 for the rear. I know I need around 4.75 to 5" bs for the fronts(18x8) and 5.5" for the rear(18x9.5). How close are these in 20mm to that??

Also I rear that I will need the hub centric rings to make it right. Are these going to nned be custom made?? If so who can do it?? Also..do I need to go up to 1/2" studs??? Thanks!

[4086D9]

anyone????

[Tom Welch]

25mm is approximately 1 inch, so 20mm is obviously a little less, my guess here is that the front wheels are very close to the correct backspace. The rears will probably be close , too. The only way to be sure is to study wheel offsets and learn the difference between positive and negative offsets and a zero offset. I'm not sure about the hub rings, I think the ricer crowd would know more about that.

[4086D9]

I did some figuring and it looks like I will need about a 1/4" spacer for the rear and nothing for the front. Now just mostly worried about the stud sizing and bolt pattern.

[go-fish]

This site helps me out when I need to do conversions. Good luck. http://www.onlineconversions.com/

[Jeremy]

With the numbers you gave, your BS on the front should be 5.54 and the BS on the rear should be 6.04. I run BMW wheels on my 2nd gen and have no problem with the bolt pattern (5 x 120) and the 7/16 studs.

Make sure that you run bulge seat lugs as the standard acorn will not contact enough of the taper. Plus, the hex shape of the lug may gouge the taper. I know Oreilly and Autozone carry the bulge seat lugs in the stores and Summit has some in various colors.