Why do the German's use Lug Bolts instead of Lug Nuts?
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Why do the German's use Lug Bolts and everyone else does it wrong?
Have you seen the two-part Porsche bolts where the seating surface does not turn against the wheel?
Have you seen the two-part Porsche bolts where the seating surface does not turn against the wheel?
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The cone of the lug bolt turns freely on the shaft.
The head face and outer face of the "cone" are flat and fairly polished, so they minimize drag during tightening so the majority of the applied torque is goes directly to bolt tension.
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From: Emmett, ID, USA
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I took off my Datsun 510 a slew of these bolts with a washer permanently on them. They are called "washer bolts" (creative name, right?). How they are made, I do not know. Maybe the threads are forged, with the forging causing the outside of the threads to stick up from the shaft.
Last edited by eric_in_sd; Apr 8, 2023 at 04:46 PM.
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Sounds a lot like a washer to me! There are conical washers.
I took off my Datsun 510 a slew of these bolts with a washer permanently o usen them. They are called "washer bolts" (creative name, right?). How they are made, I do not know. Maybe the threads are forged, with the forging causing the outside of the threads to stick up from the shaft.
I took off my Datsun 510 a slew of these bolts with a washer permanently o usen them. They are called "washer bolts" (creative name, right?). How they are made, I do not know. Maybe the threads are forged, with the forging causing the outside of the threads to stick up from the shaft.
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From: Emmett, ID, USA
2007 GL450
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Apparently they are known as "Floating Collar Lug nuts".
Porsche seems to be the only one using a "bolt" style.
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I guess they have to be different. Since we are talking about the different seats, is there an advantage of ball seat over cone seat anyways? Why are there two different seats anyways.
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I am sure some engineer at Porsche had some very good reason to use a spherical seat instead of a cone.
Maybe has to do with early alloy wheels and alloy lug nuts?
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Hmmm I wonder if it is the same Reason as MB's star pattern lug bolt design? Or they just want to keep you out from your own product? Same as using TORX screws or "security" screws on certain major appliances/electronics?
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Those make sense, the manufactures don't want just anyone inside their devices. Could be high voltage caps inside or other dangerous stuff.
But for a lug bolt, I don't get why they'd be different. When I bought my Benz wheels for my Audi A6, I had to purchase different bolts, as the seats were different than the Audi ones.
But for a lug bolt, I don't get why they'd be different. When I bought my Benz wheels for my Audi A6, I had to purchase different bolts, as the seats were different than the Audi ones.
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I didn't pay attention when looking at the tool kit on my GL, but my BMW's have all come with a tool that you insert into one of the bolt holes and you hang the wheel on that; makes things much easier. You could probably pick one up on eBay or from a BMW specialist shop - this one is from Turner:
EWK 2 Pcs M14 x P1.5 Wheel Hanger, Wheel Alignment Pin, Rim Stud Pin Guide Tool
Last edited by tbirdvet; Apr 10, 2023 at 02:37 PM.
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Fastener/tool retention, drive torque without deformation, etc.
Security screws are typically used for that exact reason.
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I'll say it again; I bet they were implemented to prevent galling of the aluminum wheel, because that's a better solution than putting in some sort of a seat in the hole in the wheel, which I bet they started doing when they realized they were going overboard on the engineering for something the vast majority of users would never even notice, let alone think about, unless they had to buy a replacement, at which point they would wonder why a lug bolt costs them twenty bucks.
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I wish they were made from steel, though. Speaking of galling, the aluminum has high friction on the bolt holes, making them annoying to insert, even after greasing the threads.
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2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
