Confirm these wheel tire specs for 67 firebird guys

[LONE*STAR]

I think that I have settled on these stern st-11 in black, they are obviously not the lightest wheel. They are 5x120, 18x8.5,9.5 13mm offset in front 15mm in rear. I plugged the specs into the wheel calculator below tell me what you think?
https://static1.pt-content.com/images/pt/2009/05/7718_1-1.jpg
https://static1.pt-content.com/images/noimg.gif

[neki67]

Those are BMW 5-series (E39) wheels and yes they will work. If memory serves me right you can use a 1/4 - 1/2" adapter in the rear. On top of that you also need some hubcentric wheels.

Great looking wheel BTW. Where are you going to buy them, if you don't mind me asking?

[CliffsBlueCamaro]

Someone correct me if I'm wrong - but dont the Firebirds have a wider rear end? (The whole "Wide Track" thing?)

You *might* not have to use any spacers in the rear.

Get some Hubcentric Rings, ang you should be set!

[Tom Welch]

measure twice, order once...

[LONE*STAR]

Just search Stern wheels on ebay there's a few power sellers that have em'. There made by Golden apple which makes ADR...

I'm not worried about needing to use a small spacer to get just right. I'm just worried about not having enough offset to tuck.

[79-TA]

120mm is not equal to 4.75in. Your lug spacing, assuming it is stock, is 120.65mm. Drawing the difference out on autoCAD, your Stern wheel's lug holes need nearly a millimeter of play to fit on your 120.65mm bolt pattern without bending the lugs. If they do fit, I have to wonder if the lug nuts would seat properly.


I've been curious as to whether or not it was possible to slip 120mm wheels on a 120.7mm bolt pattern. If it works, tell us, because that opens up a lot of wheel options. Until then, I think there's a reason we don't see more BMW style wheels on F-bodies.


What you might try is running an adapter to reduce the bolt pattern to the more common 114.3mm spacing(which those wheels should be available in.) This should work as a spacer and make up for any large offset. The adapters from Transdapt, for example, are 1.25 inches thick.

[neki67]

I'm driving around with 5x120mm for the last 9 years w/o any problems and so have many others. So yes, you have a whole extra world of wheels to choose from.

The difference is actually 0.325mm per hole. There have been lengthy and very elaborate discussion on here not too long ago about the load on the studs (they have to bend).

[MonzaRacer]

your lug holes are off by, if memory serves me 0.012 each. If you use hubcentric rings to center wheel, to axle hub, then carefully just light finger tight on each and run each lug up in increments like 25 50 75 and then final at 100 lbft of torque (as I am assuming you are driving a GM product and 99 percent run the 95-105 torque range) and use star pattern, the slight difference will not cause any issues, if you are super worried have axles/hubs set up in milling machine, and go up in stud diameter and change but honestly the difference is so little considering that removal of the wheel nuts several times will negate any problems. Ever pull off steel wheel lugs that have grooves worn in then, some in the 0.030 to 0.060 deep, ever think of those?
0.012 is what 3 or 4 sheets of copy paper. Ever put a wheel sud in, honestly I do and studs get major abuse, but the stress from this is negligible as studs are elastic to produce a clamp load not hold a wheel on. the face of the wheel holds more force. Ever see some of these new Chinese wheels from jegs/summit with very small clamp face, scary for people like my buddy who runs big blocksand loves to burn rubber.

[LONE*STAR]

I guess I need to pull off my wheels and measure my hubs