Hub-centric vs. Lug-centric

[Southpaw]

You're killing me guys......

I said I know what the obvious answer is. I know what they claim, and why they are designed the way they are.

How bout this instead. Does anybody actually know anyone who has had problems with lug-centric wheels?

What is the shear strength of our bolts? Really, what does it take to break them? I trust them.

As far as balancing and being out of round (runoff), like I said if your lugnuts are tapered, and they are torqued right, they should run true, right? Any runoff would be due to a defect in the wheel.

[Clay Henry]

Originally Posted by Southpaw

You're killing me guys......

I said I know what the obvious answer is. I know what they claim, and why they are designed the way they are.

How bout this instead. Does anybody actually know anyone who has had problems with lug-centric wheels?

What is the shear strength of our bolts? Really, what does it take to break them? I trust them.

As far as balancing and being out of round (runoff), like I said if your lugnuts are tapered, and they are torqued right, they should run true, right? Any runoff would be due to a defect in the wheel.

I don't know what the shear is, probably upwards of 100k psi which is easy to accomplish given the tiny edge of the wheel that sits against it.
I have twisted off more than one lug bolt if that tells you anything.

[Southpaw]

Have you really?

Interesting.

[Clay Henry]

yes i have, not on a superduty Ford but still.

[Southpaw]

Remind me not to arm wrestle you at SSS

[boschert_72]

well, to partake in the flinging of poo......
I takes a lot of energy to break/shear lug bolts on anything, repeated stress of course will make a difference, but aside from that think of a top fuel dragster launching.
Some 3000+ horsepower going to an enormous amount of traction in les time than u can let yur foot of the brake in our trucks, all running through just 5 9/16 or 5/8 studs torqued to 100-150 ftlbs.
We have 8 to do the same with much less power and traction.

Aside from that, i dont know what the deal was but i used to work at sears auto(yah i know) and had a customer with a bmw that hold lug centric bolts, and wheels that had a hub centric option. We could not get the car to stop vibrating no matter what we did until we ordered special rings. Didnt make much sense because the factory wheels were lug centric......
I dont know if that helps but that is my experience

[Southpaw]

Good points ^ Looks like you're arguing both sides there.....


That's all i'm looking for, is opinions and experiences. I may be wrong(I am all the time), but i'm just not convinced that hub-centric wheels are really that much of an advantage.

Just looking to have an intelligent conversation about it.

[Clay Henry]

Originally Posted by boschert_72

well, to partake in the flinging of poo......
I takes a lot of energy to break/shear lug bolts on anything, repeated stress of course will make a difference, but aside from that think of a top fuel dragster launching.
Some 3000+ horsepower going to an enormous amount of traction in les time than u can let yur foot of the brake in our trucks, all running through just 5 9/16 or 5/8 studs torqued to 100-150 ftlbs.
We have 8 to do the same with much less power and traction.

Aside from that, i dont know what the deal was but i used to work at sears auto(yah i know) and had a customer with a bmw that hold lug centric bolts, and wheels that had a hub centric option. We could not get the car to stop vibrating no matter what we did until we ordered special rings. Didnt make much sense because the factory wheels were lug centric......
I dont know if that helps but that is my experience

Flinging poo? You don't believe I can twist off a lug bolt? And the dragster scenario is a bit out there. Those are not by far the same as a factory ford lug... And there's a whole lotta physics involved there to that I really shouldn't get into.

[boschert_72]

I didn't say that you cant break lug nuts/studs off. I just stated my experience.
It takes 150,000 psi to break a 9/16 grade 8 stud. so it would take roughly 1,200,000 psi of force to sheer all eight. Again not saying its not possible it just not easy.
I didn't mean any disrespect with the flinging poo comment, just a joke, im sorry if i offended you.
And tell me what about the dragster scenario is a little bit out there?
The studs on a top fuel car are not grade 8 i know. they are arp/s2000 studs. which have a shear strength of 220,000 psi. and yes there are only 5 most of the time. sometimes 6. Fill me in if you dont mind?

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Last edited by boschert_72 : 07-04-2009 at 06:30 PM. Reason: spelling

[DCSpecial]

It's not hard to twist off of stud on a SD...I did that last year on one of our DRWs as I didn't catch that the thread on the stud got damaged.


I did see pics of a truck with lug-centric wheels that had some lugs snap, and pulled some studs through the hub itself....and I think some lug nuts were gone. Which happened first and what was the cause, who knows. It was towing a 14k gooseneck coming on a steep decline if I remember correctly.



Personally I can't say that I've seen any issues, and we sell a lot of lug-centric wheels as that is what the majority of all wheels are for the Super Duty.


Myself, I do run Weld wheels on both my SDs as Welds are hub-centric. And they are one piece forged which I also like