[DeTomaso] Wheel offset (ET)

Thu Aug 2 22:52:19 EDT 2012

Thanks for sharing.

Larger wheels and setting the wheel more outboard changes the stress points
and geometry as I said.

I also have to ask, what kind of short sighted person drops $2500 on 17 or
larger wheels and $1,500 on tires and is then too cheap to spend $79 on an
alignment to make it all last longer.

Michael
On Aug 2, 2012 10:45 PM, "B Hower" <b.hower3400 at yahoo.com> wrote:

> I just talked to guy tonight that said in the '55 Chevy he changed from
> ball to taper in the front spindles. He said that reversed rims caused a
> lot of bearing failure in the long ago past.
>
> Bud #3400
>
> --- On *Thu, 8/2/12, Will Kooiman <will.kooiman at gmail.com>* wrote:
>
>
> From: Will Kooiman <will.kooiman at gmail.com>
> Subject: Re: [DeTomaso] Wheel offset (ET)
> To: "Damaadams" <damaadams at aol.com>
> Cc: michael at michaelshortt.com, guson at home.se, detomaso at realbig.com
> Date: Thursday, August 2, 2012, 12:24 PM
>
> Seems unlikely with ball bearings, but you never know.
>
> On Aug 2, 2012, at 12:21 PM, Damaadams wrote:
>
> > I was under the impression that wheel offset was also designed to
> correctly transmit loads to and through the wheel bearings. Wheel bearings,
> I think,?are ideally loaded in the vertical plane. Offsetting the wheel
> from the designed load axis introduces a constant eccentric load. I
> remember my buddy in high school who ran chrome reversed wheels and
> promptly destroyed his wheel bearings. I may well be wrong on all this.
> Jack, what do you say?
> > ?
> > Daryl Adams
> > Mangusta 8MA888
> > ?
> > original message-----
> > From: michael at michaelshortt.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=michael@michaelshortt.com><
> michaelsavga at gmail.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=michaelsavga@gmail.com>
> >
> > To: Julian Kift <julian_kift at hotmail.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=julian_kift@hotmail.com>
> >
> > Cc: guson <guson at home.se<http://us.mc1612.mail.yahoo.com/mc/compose?to=guson@home.se>>;
> De Tomaso List <detomaso at realbig.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=detomaso@realbig.com>
> >
> > Sent: Wed, Aug 1, 2012 4:54 pm
> > Subject: Re: [DeTomaso] Wheel offset (ET)
> >
> >
> >
> >
> >
> > The problem is that there are too many number flying around.
> >
> > The only number that matters for 90% of most applications is
> backspacing,
> > how it differs from stock.
> >
> > If the backspacing is a larger number, the wheel rides inboard more, if
> it
> > is a small number, the wheel sticks out more.
> >
> > If the wheels are wider or smaller, you just have to do the math.
> >
> > let's say a car is OEM with an 8" wheel with 4" of backspacing,
> >
> > you want to buy a 10" wheel with 6" of backspacing
> >
> > Your wheel is 2" inches wider, and rides inboard 2" more, therefore,
> your
> > exterior appearance should not look any different.
> >
> > If on the other hand, you want to use a 12" wheel with 3" of backspace,
> > then the wheel will stick out past the
> >
> > OEM outer most point by 1" for the backspacing plus another 4" for the
> > wider wheel for a total of 5",
> >
> > you are now driving a skateboard or have plans to install flares.
> >
> > Michael
> >
> >
> >
> > On Wed, Aug 1, 2012 at 5:34 PM, Julian Kift <julian_kift at hotmail.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=julian_kift@hotmail.com>>
> wrote:
> >
> > >  In my experience backspacing depends entirely on the wheel
> manufacturer
> > > you are talking to and worth clarifying with them up front. Kodiak
> and most
> > > others I have dealt with here in the US use the tire bead i.e.
> inner rim lip
> > >
> > > Kodiak has a worksheet on their website, which may or may not help
> you.
> > > http://www.kodiakracingwheels.com/ordering.html
> > >
> > > Whose wheels do you have? I think there was a very quick jump to
> the
> > > conclusion the part #'s represent the offset, which may or may not
> be the
> > > case, but some substantiation is likely warranted.
> > >
> > > Julian
> > >
> > >  > From: guson at home.se<http://us.mc1612.mail.yahoo.com/mc/compose?to=guson@home.se>
> > > > To: michael at michaelshortt.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=michael@michaelshortt.com>
> > > > Date: Wed, 1 Aug 2012 12:44:30 -0700
> > > > CC: detomaso at realbig.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=detomaso@realbig.com>
> > > > Subject: Re: [DeTomaso] Wheel offset (ET)
> > > >
> > > > When calculating ET the reference is the middle of the tire
> which in
> > > > turn is determined by the inner edges of the rim. You can
> assume that
> > > > the outside of the edge is 1/2" further out on each side of
> the rim but
> > > > especially on aluminum rims this measurement can differ from
> side to
> > > > side on the rim. My calculations were assuming that your
> reference was
> > > > the same for BS and rim width. If they weren't my calculations
> are off.
> > > >
> > > > Rim width is always inside the lip. Backspacing is measured
> outside the
> > > > lip like Michael says.
> > > >
> > > > Tomas
> > > >
> > > > <-----Ursprungligt Meddelande----->
> > > > From: michael at michaelshortt.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=michael@michaelshortt.com>[
> michael at michaelshortt.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=michael@michaelshortt.com>]
>
> > > > Sent: 1/8/2012 7:51:57 PM
> > > > To: Bjoern Flesland
> > > > Cc: Tomas Gunnarsson,POCA Detomasolist Realbig
> > > > Subject: Re: [DeTomaso] Wheel offset (ET)
> > > >
> > > > I do not think they use the lip, I think they use the outside
> edge, as
> > > > in the part that touches the ground when it lays flat.
> > > >
> > > > Michael Shortt
> > > >
> > > > On Wed, Aug 1, 2012 at 1:43 PM, Bjoern Flesland <
> bflesland at gmail.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=bflesland@gmail.com>>
>
> > > > wrote:
> > > > > But stampings does not match quite up with the
> calculations that Tomas
> > > > did.
> > > > >
> > > > > So I am confused!
> > > > > Can it be measured in different ways?
> > > > > Cheers Bjoern
> > > > >
> > > > > Sent from my iPhone
> > > > >
> > > > >
> > > > > Den 1. aug. 2012 kl. 20:08 skrev "
> michael at michaelshortt.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=michael@michaelshortt.com>"
>
> > > > <michaelsavga at gmail.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=michaelsavga@gmail.com>>:
>
> > > > >
> > > > >> Yes, I think that is exactly what that means.
> > > > >>
> > > > >> Michael Shortt
> > > > >>
> > > > >>
> > > > >>
> > > > >> On Wed, Aug 1, 2012 at 1:06 PM, Bjoern Flesland <
> bflesland at gmail.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=bflesland@gmail.com>>
>
> > > > wrote:
> > > > >>> Thanks for helping out.
> > > > >>> They are stamped the following:
> > > > >>>
> > > > >>> Front
> > > > >>> 28 85 8 LA3
> > > > >>> 8.5JX18H2E64
> > > > >>>
> > > > >>> Rear
> > > > >>> 28 13 8 LA
> > > > >>> 13JX18H2E39
> > > > >>>
> > > > >>> Could that indicate ET of 64 and 39 mm?
> > > > >>>
> > > > >>> Cheers Bjoern
> > > > >>> Sent from my iPhone
> > > > >>>
> > > > >>>
> > > > >>> Den 1. aug. 2012 kl. 19:36 skrev "Tomas
> Gunnarsson" <guson at home.se<http://us.mc1612.mail.yahoo.com/mc/compose?to=guson@home.se>>:
>
> > > > >>>
> > > > >>> If you have used the same edges as reference for
> all measurements
> > > > the narrow
> > > > >>> rim has ET70 and the wide rim ET51.
> > > > >>>
> > > > >>> Tomas
> > > > >>>
> > > > >>> <-----Ursprungligt Meddelande----->
> > > > >>> From: Bjoern Flesland [bflesland at gmail.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=bflesland@gmail.com>]
>
> > > > >>> Sent: 1/8/2012 6:22:47 PM
> > > > >>> To: POCA Detomasolist Realbig
> > > > >>> Subject: [DeTomaso] Wheel offset (ET)
> > > > >>>
> > > > >>> I am trying to determine the offset (ET) of two
> wheels and need some
> > > > advise:
> > > > >>>
> > > > >>> One wheel measure 184 mm from the mounting
> face/flange to the inner
> > > > rim
> > > > >>> edge.
> > > > >>> Wheel width is 228 mm.
> > > > >>>
> > > > >>> The other measure 216 mm from the mounting
> face/flange to the inner
> > > > rim
> > > > >>> edge.
> > > > >>> Wheel width is 330 mm.
> > > > >>>
> > > > >>> Appreciate your help. Thanks!
> > > > >>> Cheers Bjoern
> > > > >>>
> > > > >>> _______________________________________________
> > > > >>>
> > > > >>> Detomaso Forum Managed by POCA
> > > > >>>
> > > > >>> Archive Search Engine Now Available at
> > > > http://www.realbig.com/detomaso/
> > > > >>>
> > > > >>> DeTomaso mailing list
> > > > >>> DeTomaso at list.realbig.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=DeTomaso@list.realbig.com>
> > > > >>> http://list.realbig.com/mailman/listinfo/detomaso
> > > > >>> .
> > > > >>
> > > > >>
> > > > >>
> > > > >> --
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >> Michael L. Shortt
> > > > >> Savannah, Georgia
> > > > >> www.michaelshortt.com <
> http://www.michaelshortt.com/>
> > > > >> michael at michaelshortt.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=michael@michaelshortt.com>
> > > > >> 912-232-9390
> > > > >>
> > > > >>
> > > > >> This email is protected by the Electronic
> Communications Privacy
> > > > >> Act, 18 U.S.C. Sec. 2510-2521, is confidential and
> may be legally
> > > > >> privileged. If you are not the intended recipient,
> you are hereby
> > > > notified
> > > > >> that any retention, dissemination, distribution or
> copying of this
> > > > >> communication is strictly prohibited. Please reply to
> the sender that
> > > > you
> > > > >> have received this message in error, then delete it.
> Thank you
> > > >
> > > >
> > > >
> > > > --
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Michael L. Shortt
> > > > Savannah, Georgia
> > > > www.michaelshortt.com <http://www.michaelshortt.com/>
> > > > michael at michaelshortt.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=michael@michaelshortt.com>
> > > > 912-232-9390
> > > >
> > > >
> > > > This email is protected by the Electronic Communications
> Privacy
> > > > Act, 18 U.S.C. Sec. 2510-2521, is confidential and may be
> legally
> > > > privileged. If you are not the intended recipient, you are
> hereby
> > > > notified
> > > > that any retention, dissemination, distribution or copying of
> this
> > > > communication is strictly prohibited. Please reply to the
> sender that
> > > > you
> > > > have received this message in error, then delete it. Thank you
> > > > _______________________________________________
> > > >
> > > > Detomaso Forum Managed by POCA
> > > >
> > > > Archive Search Engine Now Available at
> http://www.realbig.com/detomaso/
> > > >
> > > > DeTomaso mailing list
> > > > DeTomaso at list.realbig.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=DeTomaso@list.realbig.com>
> > > > http://list.realbig.com/mailman/listinfo/detomaso
> > > > .
> > > >
> > > > _______________________________________________
> > > >
> > > > Detomaso Forum Managed by POCA
> > > >
> > > > Archive Search Engine Now Available at
> http://www.realbig.com/detomaso/
> > > >
> > > > DeTomaso mailing list
> > > > DeTomaso at list.realbig.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=DeTomaso@list.realbig.com>
> > > > http://list.realbig.com/mailman/listinfo/detomaso
> > >
> >
> >
> >
> > --
> >
> >
> >
> >
> >
> >
> >
> > Michael L. Shortt
> > Savannah, Georgia
> > www.michaelshortt.com
> > michael at michaelshortt.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=michael@michaelshortt.com>
> > 912-232-9390
> >
> >
> > This email is protected by the Electronic Communications Privacy
> > Act, 18 U.S.C. Sec. 2510-2521, is confidential and may be legally
> > privileged.  If you are not the intended recipient, you are hereby
> notified
> > that any retention, dissemination, distribution or copying of this
> > communication is strictly prohibited.  Please reply to the sender that
> you
> > have received this message in error, then delete it.  Thank you
> > _______________________________________________
> >
> > Detomaso Forum Managed by POCA
> >
> > Archive Search Engine Now Available at http://www.realbig.com/detomaso/
> >
> > DeTomaso mailing list
> > DeTomaso at list.realbig.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=DeTomaso@list.realbig.com>
> > http://list.realbig.com/mailman/listinfo/detomaso
> >
> >
> >
> >
> > _______________________________________________
> >
> > Detomaso Forum Managed by POCA
> >
> > Archive Search Engine Now Available at http://www.realbig.com/detomaso/
> >
> > DeTomaso mailing list
> > DeTomaso at list.realbig.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=DeTomaso@list.realbig.com>
> > http://list.realbig.com/mailman/listinfo/detomaso
>
> _______________________________________________
>
> Detomaso Forum Managed by POCA
>
> Archive Search Engine Now Available at http://www.realbig.com/detomaso/
>
> DeTomaso mailing list
> DeTomaso at list.realbig.com<http://us.mc1612.mail.yahoo.com/mc/compose?to=DeTomaso@list.realbig.com>
> http://list.realbig.com/mailman/listinfo/detomaso
>
>