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BBS Mahle Lugnut Seat Issue


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I picked up a used set of 13" Mahles, and it looks like the lugnut seat is ball seat, but i'm not 100% sure. Looks like maybe it's been worn over the years, it's almost got two steps on the inside edge.

I have a set of ball seat lugs that fit fine, but also a set of 60deg tapered ones that seem to fit fine too. The tapered ones have a sharper end that sort of goes into the hole to further grab the stud, but not sure if you guys have any advice or experience with these? 

 

image.thumb.jpeg.e4070c9c67d2eabd00a7831632e24e85.jpeg

 

image.thumb.jpeg.dfa8eb3860d4e3b80c77366024015cf8.jpeg

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'72 Metallic Malaga 2002 with a '73 M10 | Dual Weber DCOE 40s | E21 5spd and LSD | Pertronix II

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Step might be due wheel having steel mating faces for lug nuts. Either way there should not be any paint on the mating surfaces. Tightening torque will be wrong & wheels could come loose. Same goes for wheel to hub surface - no powder coating!

 

Last pic hole looks different... steel bit missing?

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2002 -73 M2, 2002 -71 forced induction. bnr32 -91

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5 minutes ago, visionaut said:

FWIW, I’ve never heard of Mahles with a ball seat…

 

I suspect they’re very-worn conical seats. (wear from loose nuts, wear from wrong nuts).

That's interesting! A post on the E9 Coupe forum says the opposite lmao. Ugh i'll try wire wheeling that paint off, maybe get a better look at the mating surface.

 

Thanks guys.

'72 Metallic Malaga 2002 with a '73 M10 | Dual Weber DCOE 40s | E21 5spd and LSD | Pertronix II

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I wonder, perhaps some/ most if not all of that will disappear when you clean that thick new looking paint out of there 

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76 2002 Survivor

71 2002 Franzi

85 318i  Doris

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It was my post on e9coupe that started this discussion.  My tire guy noticed the difference when I bought new tires for my 7x14 BBS Mahle BMW wheels on my e12 and told me I needed the Mercedes style ball seat.  I bought a set from Mesa Performance and all was good.  I am not saying all BBS wheels use that seat but it was obvious on my wheels.

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HBChris

`73 3.0CS Chamonix, `69 2000 NK Atlantik

`70 2800 Polaris, `79 528i Chamonix

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