Re: [ihc] Dual wheel bearings

["Ryan Moore" <baradium@xxxxxxxxxxx>]

----- Original Message ----- 
From: "Jim Grammer" <jgrammer@domain.elided>
To: <ihc@domain.elided>
Sent: Monday, May 10, 2004 15:43
Subject: [ihc] Dual wheel bearings


> >Date: Mon, 10 May 2004 14:10:35 -0600
> >From: bearbvd@domain.elided (Greg Hermann)
> >Subject: RE: [OLDIHC:] Re: [ihc] wheels again, dual>single conversions?
>
> >Ed--
>
> >The wheel bearings are in the SAME location relative to the tire's
contact
> >patch--and the track is the same-- the only differences are the lateral
> >location of the  wheel mounting flange on the hub and the backset of the
> >wheel.
>
> >There is no change at all in the bearing loading or the steering geometry
> >when the correct wheels are used with the correct hubs. It's when you
start
> >swapping from single to dual type wheels without understanding all the
> >details that the trouble starts---
>
> >Greg
>
> Ah, professor....please elucidate, this is most counter-intuitive ;0
>
> Understood about the relative positions of bearing and contact patch,
> however that contact patch acts on the bearings through a greatly
lengthened
> lever arm(distance from bearings to wheel mounting surface). What are we
> missing?
>
> Jim
>

There is a corresponding arm, in the opposite direction from the wheel
mounting surface, to the contact area where the tire is.  The two arms
cancel out.   There is no arm which the contact patch acts on the bearings
from in the direction you are thinking.  The contact patch is still centered
over the bearings and thus there is no "greatly lengthened arm."

-Ryan


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