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Wheels | Tires | Spacers | Hub -- Sponsored by The Tire Rack Specific topics relating to wheels and tires.


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Old 07-11-2018, 03:00 PM   #29
OND
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Originally Posted by Sachmet43 View Post
having to replace 1-2 wheel studs every time I take my wheels off to switch to track pads...
That sounds weird. What torque value do you use to tighten your lugs?
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Old 07-12-2018, 09:22 AM   #30
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I've used the steel Gorilla open-ended lugs after having similar issues with aluminum lugs. I liked that they were longer and much easier to thread by hand at the start than shorter oem-style lugnuts (if that's a concern for you). Not one problem with frequent rotations during track use.

https://www.amazon.com/Gorilla-Autom...dp/B00SF8FAAE/
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Old 07-14-2018, 02:40 AM   #31
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Originally Posted by Clipping_Path View Post
There are only three common metals with a higher thermal expansion than aluminum: plutonium, potassium & sodium.

I called a leading performance shop to ask them about my lugs after my accident. And one of their knowledgeable techs laid out the "perfect storm" of why aluminum lugs should never be used on a DD:

Galvanic corrosion:
Steel in contact with a dissimilar metal - aluminum - is in electrical contact and will create a galvanic reaction. Steel is a cathode and aluminum the anode. The aluminum will corrode preferentially.

Elasticity
Aluminum will deform 3x as much as the same configuration in steel for any given load (69GPa vs 200GPa of steel). Aluminum's thermal expansion is about 2.5x more than stainless steel, precipitating friction.

Heat
The lower modulus of elasticity and higher rate of thermal expansion of a softer metal causes excessive friction and heat build up which, most importantly, exacerbates the galvanic corrosion.

Salt
One of the essential ingredients for galvanic corrosion is the presence of an electrolyte....like sodium acetate. Using aluminum lug nuts in a salty environment like the ocean/coast or where roads have been salted accelerates the corrosion. Aluminum while it does not rust, notoriously corrodes fast in these circumstances.
I’m no licensed engineer, but I also work in the materials and corrosion group at my job.

Do you want me to highlight the things posted that are incorrect or just ask why the duck they have potato chip flavoring ingredients on their lug nuts?
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Old 07-15-2018, 07:22 AM   #32
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Originally Posted by Clipping_Path View Post
There are only three common metals with a higher thermal expansion than aluminum: plutonium, potassium & sodium.

I called a leading performance shop to ask them about my lugs after my accident. And one of their knowledgeable techs laid out the "perfect storm" of why aluminum lugs should never be used on a DD:

Galvanic corrosion:
Steel in contact with a dissimilar metal - aluminum - is in electrical contact and will create a galvanic reaction. Steel is a cathode and aluminum the anode. The aluminum will corrode preferentially.

Elasticity
Aluminum will deform 3x as much as the same configuration in steel for any given load (69GPa vs 200GPa of steel). Aluminum's thermal expansion is about 2.5x more than stainless steel, precipitating friction.

Heat
The lower modulus of elasticity and higher rate of thermal expansion of a softer metal causes excessive friction and heat build up which, most importantly, exacerbates the galvanic corrosion.

Salt
One of the essential ingredients for galvanic corrosion is the presence of an electrolyte....like sodium acetate. Using aluminum lug nuts in a salty environment like the ocean/coast or where roads have been salted accelerates the corrosion. Aluminum while it does not rust, notoriously corrodes fast in these circumstances.
this is such total bs in every way possible. Were they trying to sell you some insanely expensive alternative?
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