Wide Dish Alcoa

marcus mcgee

New member
Sep 29, 1997
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O'boy another post about Acoa Wheels!!!!!!!

In this months GMCMM Jin Anstett writes about test driving a fellow
GMC'ers coach with "WIDE DISH" Alcoas on the front. After saying it
drove beyond belief over the large ruts on an interstate, he goes on to
say that it is problematic with the bearings, steering gear etc.

Ok, I agree on all the loading problems, but "I WANT WIDER WHEELS ON MY
COACH". I know its wrong so don't yell at me. I want them and they
look good filling that empty wheel well.

OK, so what is the # of the forbiiden wheel? Jim did not say in his
article.

Marcus
 
You should consider the problems they are going to cause. If for some
reason you lose air in the back or have a soft tire, you can almost
guarantee that you will lose an airbag, and maybe more. The coach was
designed to use 8.75 tires and anything larger will cause interference
problems at certain times I talked to people at cinnabar a short time ago
with the same plan to put larger tires on my coach,since I plan to replace
the 16.5 tires with 16" ones anyway. They very strongly were against the
larger tires.

>O'boy another post about Acoa Wheels!!!!!!!
>
>In this months GMCMM Jin Anstett writes about test driving a fellow
>GMC'ers coach with "WIDE DISH" Alcoas on the front. After saying it
>drove beyond belief over the large ruts on an interstate, he goes on to
>say that it is problematic with the bearings, steering gear etc.
>
>Ok, I agree on all the loading problems, but "I WANT WIDER WHEELS ON MY
>COACH". I know its wrong so don't yell at me. I want them and they
>look good filling that empty wheel well.
>
>OK, so what is the # of the forbiiden wheel? Jim did not say in his
>article.
>
>Marcus
>
>
 
I want them on the front, not the rear. Well, aybe when I see them I'll
change my mind.

Marcus

>
> You should consider the problems they are going to cause. If for some
> reason you lose air in the back or have a soft tire, you can almost
> guarantee that you will lose an airbag, and maybe more. The coach was
> designed to use 8.75 tires and anything larger will cause interference
> problems at certain times I talked to people at cinnabar a short time ago
> with the same plan to put larger tires on my coach,since I plan to replace
> the 16.5 tires with 16" ones anyway. They very strongly were against the
> larger tires.
>

> >O'boy another post about Acoa Wheels!!!!!!!
> >
> >In this months GMCMM Jin Anstett writes about test driving a fellow
> >GMC'ers coach with "WIDE DISH" Alcoas on the front. After saying it
> >drove beyond belief over the large ruts on an interstate, he goes on to
> >say that it is problematic with the bearings, steering gear etc.
> >
> >Ok, I agree on all the loading problems, but "I WANT WIDER WHEELS ON MY
> >COACH". I know its wrong so don't yell at me. I want them and they
> >look good filling that empty wheel well.
> >
> >OK, so what is the # of the forbiiden wheel? Jim did not say in his
> >article.
> >
> >Marcus
> >
> >
 
Marcus:

Despite the dire predictions of front wheel bearing failure you always
hear whenever someone mentions using a wheel with less offset than
recommended, I'm not sure people have a valid argument. Mostly, I
believe, they are parroting what they have heard from someone else.

I'm aware of three coaches running the wider wheels without apparent
bearing difficulty.

The comments you attribute to Jim Anstett, I believe, pertain to a coach
that I'm told attended the GMCMI Las Vegas Rally. The owner, who lives
in CA, I understand hired a competent engineer to calculate the loads
associated with the wide wheels vs. the original. Supposedly, the loads
were more favorable when the wide set wheels are used. Would like to
see the calculations, however.

I'm also told that a GMC Dixelanders coach owner, from TN, has been
running the wide wheels for many years. Allegedly, he's not done any
bearing replacement and has worn out a Jasper engine in the meantime.

Jack Burke, from Mentone IN, also runs the wide wheels.

In spite of the supposed negatives in doing so, is anyone aware of
disastrous results in running wide set wheels? I'm not.

Reaction to the above should be interesting.

Paul Bartz

> -----Original Message-----
> From: Marcus McGee [SMTP:crsalert]
> Sent: Wednesday, April 29, 1998 5:06 PM
> To: gmcmotorhome
> Subject: Re: GMC: Wide Dish Alcoa
>
> I want them on the front, not the rear. Well, maybe when I see them
> I'll change my mind.
>
> Marcus
>

>
> You should consider the problems they are going to cause. If for some
> reason you lose air in the back or have a soft tire, you can almost
> guarantee that you will lose an airbag, and maybe more. The coach was
> designed to use 8.75 tires and anything larger will cause interference
> problems at certain times. I talked to people at Cinnabar a short
> time ago with the same plan to put larger tires on my coach,since I
> plan to replace the 16.5 tires with 16" ones anyway. They very
> strongly were against the larger tires.
>

>
> O'boy another post about Acoa Wheels!!!!!!!
>
> In this months GMCMM Jin Anstett writes about test driving a fellow
> GMC'ers coach with "WIDE DISH" Alcoas on the front. After saying it
> drove beyond belief over the large ruts on an interstate, he goes on
> to say that it is problematic with the bearings, steering gear etc.
>
> Ok, I agree on all the loading problems, but "I WANT WIDER WHEELS ON
> MY COACH". I know its wrong so don't yell at me. I want them and
> they look good filling that empty wheel well.
>
> OK, so what is the # of the forbiiden wheel? Jim did not say in his
> article.
>
> Marcus
 
Marcus:

Forgot to mention that the CA owner is supposedly running an Alcoa wheel
normally used on late model Ford dually trucks. I believe that since
that wheel does not use the piloted feature of the hub, that a thin
spacer is needed.

You may want to contact Jim Anstett to get the CA coach owners name and
talk to him about the details.

Paul

> -----Original Message-----
> From: Bartz, Paul
> Sent: Thursday, April 30, 1998 9:35 AM
> To: 'gmcmotorhome'
> Subject: RE: GMC: Wide Dish Alcoa
>
> Marcus:
>
> Despite the dire predictions of front wheel bearing failure you always
> hear whenever someone mentions using a wheel with less offset than
> recommended, I'm not sure people have a valid argument. Mostly, I
> believe, they are parroting what they have heard from someone else.
>
> I'm aware of three coaches running the wider wheels without apparent
> bearing difficulty.
>
> The comments you attribute to Jim Anstett, I believe, pertain to a
> coach that I'm told attended the GMCMI Las Vegas Rally. The owner,
> who lives in CA, I understand hired a competent engineer to calculate
> the loads associated with the wide wheels vs. the original.
> Supposedly, the loads were more favorable when the wide set wheels are
> used. Would like to see the calculations, however.
>
> I'm also told that a GMC Dixelanders coach owner, from TN, has been
> running the wide wheels for many years. Allegedly, he's not done any
> bearing replacement and has worn out a Jasper engine in the meantime.
>
> Jack Burke, from Mentone IN, also runs the wide wheels.
>
> In spite of the supposed negatives in doing so, is anyone aware of
> disastrous results in running wide set wheels? I'm not.
>
> Reaction to the above should be interesting.
>
> Paul Bartz
>
> -----Original Message-----
> From: Marcus McGee [SMTP:crsalert]
> Sent: Wednesday, April 29, 1998 5:06 PM
> To: gmcmotorhome
> Subject: Re: GMC: Wide Dish Alcoa
>
> I want them on the front, not the rear. Well, maybe when I see them
> I'll change my mind.
>
> Marcus
>

>
> You should consider the problems they are going to cause. If for some
> reason you lose air in the back or have a soft tire, you can almost
> guarantee that you will lose an airbag, and maybe more. The coach was
> designed to use 8.75 tires and anything larger will cause interference
> problems at certain times. I talked to people at Cinnabar a short
> time ago with the same plan to put larger tires on my coach,since I
> plan to replace the 16.5 tires with 16" ones anyway. They very
> strongly were against the larger tires.
>

>
> O'boy another post about Acoa Wheels!!!!!!!
>
> In this months GMCMM Jin Anstett writes about test driving a fellow
> GMC'ers coach with "WIDE DISH" Alcoas on the front. After saying it
> drove beyond belief over the large ruts on an interstate, he goes on
> to say that it is problematic with the bearings, steering gear etc.
>
> Ok, I agree on all the loading problems, but "I WANT WIDER WHEELS ON
> MY COACH". I know its wrong so don't yell at me. I want them and
> they look good filling that empty wheel well.
>
> OK, so what is the # of the forbiiden wheel? Jim did not say in his
> article.
>
> Marcus
 
I wonder what the large tire chain dealers have to say about it and how
filtered their opinions are???

Paul Bartz

> -----Original Message-----
> From: CHill113 [SMTP:CHill113]
> Sent: Thursday, April 30, 1998 12:13 PM
> To: gmcmotorhome
> Subject: Re: GMC: Wide Dish Alcoa
>
> Paul
> I've always heard the story about bearing problems too. However I see
> A LOT
> of pickups and cars driven by the younger set who have very wide
> wheels.
> Perhaps checking with someone on how much bearing trouble these
> vehicles have
> had would give us a clue!
 
Going a little wider shouldn't have much effect on the bearings unless
the offset is wrong.

Remember, if you were to move from a 7 inch wheel to an 8 inch wheel,
the new wheel could protrude out 1 inch, or 1/2 inch, or not at all,
depending on the offset.

On one of my cars, I am able to get an 8" wheel up front where others
can only use a 7, because I found a wheel where the extra inch was
compensated for by a change in offset.

Bob Brewer

- -----Original Message-----
From: Bartz, Paul [mailto:s9d3452]
Sent: Thursday, April 30, 1998 9:24 AM
To: 'gmcmotorhome'
Subject: RE: GMC: Wide Dish Alcoa

I wonder what the large tire chain dealers have to say about it and how
filtered their opinions are???

Paul Bartz

> -----Original Message-----
> From: CHill113 [SMTP:CHill113]
> Sent: Thursday, April 30, 1998 12:13 PM
> To: gmcmotorhome
> Subject: Re: GMC: Wide Dish Alcoa
>
> Paul
> I've always heard the story about bearing problems too. However I see
> A LOT
> of pickups and cars driven by the younger set who have very wide
> wheels.
> Perhaps checking with someone on how much bearing trouble these
> vehicles have
> had would give us a clue!
 
Bob:

If I'm not mistaken, a change in the offset is what it will take to get
the front wheel width to match with the rear wheels and not the tire
width.

Paul Bartz

> From: Brewer, Bob [SMTP:rebrewer]
> Sent: Thursday, April 30, 1998 12:33 PM
> Subject: RE: GMC: Wide Dish Alcoa
>
> Going a little wider shouldn't have much effect on the bearings unless
> the offset is wrong.
>
> Remember, if you were to move from a 7 inch wheel to an 8 inch wheel,
> the new wheel could protrude out 1 inch, or 1/2 inch, or not at all,
> depending on the offset.
>
> On one of my cars, I am able to get an 8" wheel up front where others
> can only use a 7, because I found a wheel where the extra inch was
> compensated for by a change in offset.
>
>
> Bob Brewer
>
> From: Bartz, Paul [mailto:s9d3452]
> Sent: Thursday, April 30, 1998 9:24 AM
> Subject: RE: GMC: Wide Dish Alcoa
>
>
> I wonder what the large tire chain dealers have to say about it and
> how
> filtered their opinions are???
>
> Paul Bartz
>
> > From: CHill113 [SMTP:CHill113]
> > Sent: Thursday, April 30, 1998 12:13 PM
> > Subject: Re: GMC: Wide Dish Alcoa
> >
> > Paul
> > I've always heard the story about bearing problems too. However I
> see
> > A LOT
> > of pickups and cars driven by the younger set who have very wide
> > wheels.
> > Perhaps checking with someone on how much bearing trouble these
> > vehicles have
> > had would give us a clue!
 
- -----Original Message-----
From: Bartz, Paul [mailto:s9d3452]
Sent: Thursday, April 30, 1998 9:41 AM
To: 'gmcmotorhome'
Subject: RE: GMC: Wide Dish Alcoa

Bob:

If I'm not mistaken, a change in the offset is what it will take to get
the front wheel width to match with the rear wheels and not the tire
width.

Paul Bartz

> From: Brewer, Bob [SMTP:rebrewer]
> Sent: Thursday, April 30, 1998 12:33 PM
> Subject: RE: GMC: Wide Dish Alcoa
>
> Going a little wider shouldn't have much effect on the bearings unless
> the offset is wrong.
>
> Remember, if you were to move from a 7 inch wheel to an 8 inch wheel,
> the new wheel could protrude out 1 inch, or 1/2 inch, or not at all,
> depending on the offset.
>
> On one of my cars, I am able to get an 8" wheel up front where others
> can only use a 7, because I found a wheel where the extra inch was
> compensated for by a change in offset.
>
>
> Bob Brewer
>
> From: Bartz, Paul [mailto:s9d3452]
> Sent: Thursday, April 30, 1998 9:24 AM
> Subject: RE: GMC: Wide Dish Alcoa
>
>
> I wonder what the large tire chain dealers have to say about it and
> how
> filtered their opinions are???
>
> Paul Bartz
>
> > From: CHill113 [SMTP:CHill113]
> > Sent: Thursday, April 30, 1998 12:13 PM
> > Subject: Re: GMC: Wide Dish Alcoa
> >
> > Paul
> > I've always heard the story about bearing problems too. However I
> see
> > A LOT
> > of pickups and cars driven by the younger set who have very wide
> > wheels.
> > Perhaps checking with someone on how much bearing trouble these
> > vehicles have
> > had would give us a clue!
 
Paul,

Sort of. It has more to do with track width at the front. The concern
here seems to be with presenting the wheel bearings with additional load
due to a wider width wheel sticking out more than stock. The offset
(from center) or the other commonly used measurement, backspacing, will
determine what length "lever arm" the bearing will see.

Unless, of course, I've completely missed the point!

Regards,

Bob

- -----Original Message-----
From: Bartz, Paul [mailto:s9d3452]
Sent: Thursday, April 30, 1998 9:41 AM
To: 'gmcmotorhome'
Subject: RE: GMC: Wide Dish Alcoa

Bob:

If I'm not mistaken, a change in the offset is what it will take to get
the front wheel width to match with the rear wheels and not the tire
width.

Paul Bartz

> From: Brewer, Bob [SMTP:rebrewer]
> Sent: Thursday, April 30, 1998 12:33 PM
> Subject: RE: GMC: Wide Dish Alcoa
>
> Going a little wider shouldn't have much effect on the bearings unless
> the offset is wrong.
>
> Remember, if you were to move from a 7 inch wheel to an 8 inch wheel,
> the new wheel could protrude out 1 inch, or 1/2 inch, or not at all,
> depending on the offset.
>
> On one of my cars, I am able to get an 8" wheel up front where others
> can only use a 7, because I found a wheel where the extra inch was
> compensated for by a change in offset.
>
>
> Bob Brewer
>
> From: Bartz, Paul [mailto:s9d3452]
> Sent: Thursday, April 30, 1998 9:24 AM
> Subject: RE: GMC: Wide Dish Alcoa
>
>
> I wonder what the large tire chain dealers have to say about it and
> how
> filtered their opinions are???
>
> Paul Bartz
>
> > From: CHill113 [SMTP:CHill113]
> > Sent: Thursday, April 30, 1998 12:13 PM
> > Subject: Re: GMC: Wide Dish Alcoa
> >
> > Paul
> > I've always heard the story about bearing problems too. However I
> see
> > A LOT
> > of pickups and cars driven by the younger set who have very wide
> > wheels.
> > Perhaps checking with someone on how much bearing trouble these
> > vehicles have
> > had would give us a clue!
 
Bob, et al:

What we really need to do is identify the CA coach owner who I mentioned
was at the GMCMI Las Vegas Rally and get him to share the engineering
data/calculations on the front wheel bearings he obtained. Anyone know
the name of whom I speak of?

Paul Bartz

> -----Original Message-----
> From: Brewer, Bob [SMTP:rebrewer]
> Sent: Thursday, April 30, 1998 12:56 PM
> To: 'gmcmotorhome'
> Subject: RE: GMC: Wide Dish Alcoa
>
> Paul,
>
> Sort of. It has more to do with track width at the front. The
> concern
> here seems to be with presenting the wheel bearings with additional
> load
> due to a wider width wheel sticking out more than stock. The offset
> (from center) or the other commonly used measurement, backspacing,
> will
> determine what length "lever arm" the bearing will see.
>
> Unless, of course, I've completely missed the point!
>
> Regards,
>
> Bob
>
> -----Original Message-----
> From: Bartz, Paul [mailto:s9d3452]
> Sent: Thursday, April 30, 1998 9:41 AM
> To: 'gmcmotorhome'
> Subject: RE: GMC: Wide Dish Alcoa
>
>
> Bob:
>
> If I'm not mistaken, a change in the offset is what it will take to
> get
> the front wheel width to match with the rear wheels and not the tire
> width.
>
> Paul Bartz
>
> > From: Brewer, Bob [SMTP:rebrewer]
> > Sent: Thursday, April 30, 1998 12:33 PM
> > Subject: RE: GMC: Wide Dish Alcoa
> >
> > Going a little wider shouldn't have much effect on the bearings
> unless
> > the offset is wrong.
> >
> > Remember, if you were to move from a 7 inch wheel to an 8 inch
> wheel,
> > the new wheel could protrude out 1 inch, or 1/2 inch, or not at all,
> > depending on the offset.
> >
> > On one of my cars, I am able to get an 8" wheel up front where
> others
> > can only use a 7, because I found a wheel where the extra inch was
> > compensated for by a change in offset.
> >
> >
> > Bob Brewer
> >
> > From: Bartz, Paul [mailto:s9d3452]
> > Sent: Thursday, April 30, 1998 9:24 AM
> > Subject: RE: GMC: Wide Dish Alcoa
> >
> >
> > I wonder what the large tire chain dealers have to say about it and
> > how
> > filtered their opinions are???
> >
> > Paul Bartz
> >
> > > From: CHill113 [SMTP:CHill113]
> > > Sent: Thursday, April 30, 1998 12:13 PM
> > > Subject: Re: GMC: Wide Dish Alcoa
> > >
> > > Paul
> > > I've always heard the story about bearing problems too. However I
> > see
> > > A LOT
> > > of pickups and cars driven by the younger set who have very wide
> > > wheels.
> > > Perhaps checking with someone on how much bearing trouble these
> > > vehicles have
> > > had would give us a clue!