View Single Post
  #2  
Old December 13th 04, 05:53 PM
Chas Hurst
external usenet poster
 
Posts: n/a
Default


"Grant Edwards" > wrote in message
...
> On 2004-12-13, Lanny Chambers > wrote:
> > In article >,
> > Grant Edwards > wrote:
> >
> >> Since they're supposed to bear most of the weight of the car,
> >> I would think that one would want metal ones.

> >
> > They don't bear any weight at all.

>
> If so, there's a _lot_ of misinformation being spread by people
> (including wheel manufacturers and car mags). According to
> Ronal USA's web site:
>
> "A hubcentric fitment, is one where the interior of the
> backside of the wheel - referred to as "centerbore"-is an
> exact fit to the "hub"-that protrudes from the mounting
> surface of the wheel. The relevant issue here is that the
> WEIGHT BEARING of the wheel on the car is done on the HUB
> when it is "mated" to the wheel! This has to be an exact
> fit. The LUG NUTS, simply affix the wheel and hold the
> wheel to the car and do not affect load bearing."
>
> According to Sport Compact Car magazine:
>
> "Hubcentric wheels have a hole at their center that fits
> closely over a round feature on the hub, serving to center
> the wheel on the axis of the spindle, as well as bear the
> vertical weight of the vehicle. The wheel bolts or studs
> then serve simply to hold the wheel onto the hub, and are
> loaded only in tension, where they are strong. If the studs
> were required to absorb vertical forces, they would be
> loaded in single shear, the weakest arrangement for any
> fastener."
>
> > All they do is help center the wheel until you can get the
> > lugnuts on, and plastic works fine for this trivial task. The
> > lugs carry 100% of the weight.

>
> I think you're quite probably correct, but there sure is a lot
> of misinformation out there...
>
> > You can leave the hubcentric rings out with no ill effect.
> > Just observe the normal lug tightening sequence: run them all
> > up finger tight, then torque them in two steps, in a diagonal
> > pattern.

>
> A set of rings is only 10-15 USD, and it seems like good
> insurance.
>
> --
> Grant Edwards


I spent the money not spent on hub rings on a bottle of wine. What would hub
rings insure?

Chas Hurst


Ads