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Old 08-08-2020, 01:38 AM   #13
NotAMiata
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Quote:
Originally Posted by Lynxis View Post
You should learn a bit about the physics of how the wheel attaches to the hub before you say stuff like that. Here is some suggested reading:

https://www.maximummotorsports.com/t...s_spacers.aspx

Basically, the lugs and studs are only responsible for applying clamping force between the hub face and the seat of the wheel. All up and down, side to side, and rotational forces are transmitted directly between the hub face and wheel seat via friction applied by that clamping force. Forces applied to the studs while a vehicle is in motion don't change in any appreciable way.

Consider the shape and size of the stud which is the part that would take those forces. If the stud was bearing vertical or rotational loads, the smart thing to do would be to design it wider than it is long, or have them install into the wheel sideways, in the same direction as the spokes, but they aren't designed like that, are they?

OEMs use hub centering mostly because it makes wheels easier to install and provides fewer opportunities for mistakes when mounting the wheels, because mounting mistakes are what lead to broken studs.

Basically, once all lugs are properly torqued, the load on the wheels is entirely a function of the friction between the hub face and the seat of the wheel and has nothing to do with the hub or studs/lugs.

I should note that I'm not advocating for not running a centering ring, they are still useful and make mounting wheels way easier but the only real reason to use aluminum over plastic is if you are going to track the car because the heat generated will melt plastic.
yeah to be honest i was just parroting what I've heard from many many many people, it kinda made sense. But i just ran the math, the holding force of the wheel on the hub with the nuts torqued to 90ft/lbs is somewhere around 11,000lbs. you'd need to hit a pretty big pot hole for it to slip at all and at that point your wheel is probably d1ckered. Even worst case scenario, where your threads are really dirty and your wheel hub is soaked in grease/anti-sieze, you still get around 5000lbs of friction force between the hub and wheel.

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