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Old November 25th 15, 07:50 PM posted to rec.autos.tech
Paul in Houston TX[_2_]
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Posts: 201
Default Wheel Rims - Center Hole Important?

wrote:
> On Tuesday, 15 November 1994 14:08:42 UTC-5, Athos wrote:
>> In article >, Wes Fujii > wrote:
>>> Findeis Peter M ) wrote:
>>>
>>> : Does the edge of that center hole take some of the load : off of the 5 wheel
>>> mounting bolts when the wheel is : under high stress conditions?
>>>
>>> Yes. That hole is there to take the load of the vehicle weight on the wheel. The
>>> weight of the wheel is not supposed to be supported in shear by the studs. Because
>>> of the threads on the studs, there are lots of places where failure can propagate,
>>> plus the stud is already in tension. You might also expect that the nuts or bolts
>>> might work loose if the wheel is not supported correctly by its center.
>>>
>>> I wouldn't do it. It's not worth the risk.
>>>
>>> Wes Fujii

>>
>> The center hole is not the same size as the bearing cap. It's larger. The weight of
>> the car is borne by the spindle. It goes through the wheels to the ground via the
>> bearings in your rotor. The lugs also hold the wheel to the rotor by friction, as
>> well as shear.
>>
>> Joe

>
> Joe, Of course the spindle sees the weight of the car through the bearings, but that
> load is designed to be transferred to the wheel rim through the pilot on the hub,
> rather than through the wheel studs. Think of the times that you've had to kick a tire
> a few times to get it to pop off the hub pilot...That's exactly what it is supposed to
> do. The wheel nuts/studs are only there to hold the wheel on the hub pilot - in tension
> only.


OP was written 20 years ago.
Hubs might have been important 20 years ago when steel wheels were all the rage.

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