| changing steel wheels to alum [message #184424] |
Fri, 14 September 2012 09:06  |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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I am currently in a discussion about how many threads are allowed by DOT to show after tightening. It is centered on replacing front steel wheels on a big truck with Alcoas. This particular truck has the cone shaped lug nuts and tapered holes and are lug centered but the same discussion also covers changing the hub centered wheels also with the flat washers attached to the nut. The issue; is the stud long enough if there are 2-3 threads showing after installation. Trucks that come from the factory with Alcoas do have longer studs and probably have 1/2" stud showing. The tire store that this newbie uses says he needs longer ($500) studs to meet DOT requirements. I have ran Alcoas on the big trucks with short studs for 15 years with no issues. I did have them covered with nut covers and have been thru MANY spot DOT checks and have passed without asking me to remove a nut cover to check? I believe that 2-3 threads showing is safe from experience. Google DOT did not help. Alcoa says to use the longer studs and special Alcoa lugnuts on the hub centered wheels but no info on the tapered wheels as they are basicly obsolete.
Anybody know what the DOT requirements are??
C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] changing steel wheels to alum [message #184455 is a reply to message #184424] |
Fri, 14 September 2012 12:10  |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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We have been having this discussion over and over for years and
years. I had written a email on this many years ago pointing to this
information.
Paraphrased from GMCMI newsletter 84, page 2 article:
"Owners installing Alcoa wheels do not have to change the original
studs since there is sufficient thread length for proper mounting
provided by the Alcoa Swivel lug nuts, The original stud and Alcoa
wheel combination allows for .532 inches of thread, which is more than
the pitch diameter of the stud. A longer stud does not provide more
strength, it just has more threads exposed."
Having extra threads exposed do not make it any safer.
JR Wright
78 Buskirk Stretch
Michigan
>
>
> I am currently in a discussion about how many threads are allowed by
> DOT to show after tightening. It is centered on replacing front
> steel wheels on a big truck with Alcoas. This particular truck has
> the cone shaped lug nuts and tapered holes and are lug centered but
> the same discussion also covers changing the hub centered wheels
> also with the flat washers attached to the nut. The issue; is the
> stud long enough if there are 2-3 threads showing after
> installation. Trucks that come from the factory with Alcoas do have
> longer studs and probably have 1/2" stud showing. The tire store
> that this newbie uses says he needs longer ($500) studs to meet DOT
> requirements. I have ran Alcoas on the big trucks with short studs
> for 15 years with no issues. I did have them covered with nut
> covers and have been thru MANY spot DOT checks and have passed
> without asking me to remove a nut cover to check? I believe that
> 2-3 threads showing is safe from experience. Google DOT did not help
> . Alcoa says to use the longer studs and special Alcoa lugnuts on
> the hub centered wheels but no info on the tapered wheels as they
> are basicly obsolete.
> Anybody know what the DOT requirements are??
>
> --
> C. Boyd
> 76 Crestmont
> East Tennessee
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: changing steel wheels to alum [message #184465 is a reply to message #184424] |
Fri, 14 September 2012 13:43 |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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Senior Member |
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| Quote: |
is the stud long enough if there are 2-3 threads showing after installation.....
|
Anything past the nut is decoration. 3 threads should be fine. The weakest point of the stud is where the threads start at the shank. I'm not from MO but if more than three threads are required by the DOT I say, "Show Me"
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
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| Re: [GMCnet] changing steel wheels to alum [message #184467 is a reply to message #184424] |
Fri, 14 September 2012 14:10 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Chuck,
I don't know about DOT, but if you show a copy of this to anyone doubting
whether 2-3 threads is enough, they'll probably leave you alone in
bewilderment:
https://standards.nasa.gov/documents/viewdoc/.../3315811
Ken H.
On Fri, Sep 14, 2012 at 10:06 AM, Charles Boyd <covered-wagon@comcast.net>wrote:
>
>
> I am currently in a discussion about how many threads are allowed by DOT
> to show after tightening. It is centered on replacing front steel wheels
> on a big truck with Alcoas. This particular truck has the cone shaped lug
> nuts and tapered holes and are lug centered but the same discussion also
> covers changing the hub centered wheels also with the flat washers attached
> to the nut. The issue; is the stud long enough if there are 2-3 threads
> showing after installation. Trucks that come from the factory with Alcoas
> do have longer studs and probably have 1/2" stud showing. The tire store
> that this newbie uses says he needs longer ($500) studs to meet DOT
> requirements. I have ran Alcoas on the big trucks with short studs for 15
> years with no issues. I did have them covered with nut covers and have
> been thru MANY spot DOT checks and have passed without asking me to remove
> a nut cover to check? I believe that 2-3 threads showing is safe from
> experience. Google DOT did not help
> . Alcoa says to use the longer studs and special Alcoa lugnuts on the
> hub centered wheels but no info on the tapered wheels as they are basicly
> obsolete.
> Anybody know what the DOT requirements are??
> ..
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] changing steel wheels to alum [message #184476 is a reply to message #184467] |
Fri, 14 September 2012 15:38 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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Hi, Ken.
This is apparently a bad (incomplete?) link.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ~ TZE166V101966 ~ ~ ~ ~
~ ~ ~ '76 ex-Palm Beach ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
______________
*[ ]~~~[][ ][|\
*--OO--[]---O-*
> From: hend4800@bellsouth.net
> Date: Fri, 14 Sep 2012 15:10:51 -0400
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] changing steel wheels to alum
>
> Chuck,
>
> I don't know about DOT, but if you show a copy of this to anyone doubting
> whether 2-3 threads is enough, they'll probably leave you alone in
> bewilderment:
>
> https://standards.nasa.gov/documents/viewdoc/.../3315811
>
> Ken H.
>
>
> On Fri, Sep 14, 2012 at 10:06 AM, Charles Boyd <covered-wagon@comcast.net>wrote:
>
> >
> >
> > I am currently in a discussion about how many threads are allowed by DOT
> > to show after tightening. It is centered on replacing front steel wheels
> > on a big truck with Alcoas. This particular truck has the cone shaped lug
> > nuts and tapered holes and are lug centered but the same discussion also
> > covers changing the hub centered wheels also with the flat washers attached
> > to the nut. The issue; is the stud long enough if there are 2-3 threads
> > showing after installation. Trucks that come from the factory with Alcoas
> > do have longer studs and probably have 1/2" stud showing. The tire store
> > that this newbie uses says he needs longer ($500) studs to meet DOT
> > requirements. I have ran Alcoas on the big trucks with short studs for 15
> > years with no issues. I did have them covered with nut covers and have
> > been thru MANY spot DOT checks and have passed without asking me to remove
> > a nut cover to check? I believe that 2-3 threads showing is safe from
> > experience. Google DOT did not help
> > . Alcoa says to use the longer studs and special Alcoa lugnuts on the
> > hub centered wheels but no info on the tapered wheels as they are basicly
> > obsolete.
> > Anybody know what the DOT requirements are??
> > ..
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| Re: [GMCnet] changing steel wheels to alum [message #184517 is a reply to message #184476] |
Fri, 14 September 2012 22:13 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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This will get it, but not as cleanly as that Google reply got it for me:
https://standards.nasa.gov/documents/detail/3315811
Ken H.
On Fri, Sep 14, 2012 at 4:38 PM, D C *Mac* Macdonald wrote:
>
> Hi, Ken.
>
> This is apparently a bad (incomplete?) link.
> ...
> > I don't know about DOT, but if you show a copy of this to anyone doubting
> > whether 2-3 threads is enough, they'll probably leave you alone in
> > bewilderment:
> >
> > https://standards.nasa.gov/documents/viewdoc/.../3315811
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] changing steel wheels to alum [message #184521 is a reply to message #184517] |
Fri, 14 September 2012 22:26 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Ken,
FLASHBACK!
As I read your first message regarding the number of exposed threads the number one and one half popped into my mind.
I read through the document and found Figure 2 and if you look at it carefully it sure looks like one and one half threads are
exposed.
Regards,
Rob M.
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Ken Henderson
Sent: Friday, September 14, 2012 9:14 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] changing steel wheels to alum
This will get it, but not as cleanly as that Google reply got it for me:
https://standards.nasa.gov/documents/detail/3315811
Ken H.
On Fri, Sep 14, 2012 at 4:38 PM, D C *Mac* Macdonald wrote:
>
> Hi, Ken.
>
> This is apparently a bad (incomplete?) link.
...
> > I don't know about DOT, but if you show a copy of this to anyone doubting
> > whether 2-3 threads is enough, they'll probably leave you alone in
> > bewilderment:
> >
> > https://standards.nasa.gov/documents/viewdoc/.../3315811
>
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] changing steel wheels to alum [message #184539 is a reply to message #184538] |
Sat, 15 September 2012 01:38 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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Joe,
Number 1 - Ride, the new wheels are round and don't flex, that was the
first thing that I noticed. The new 16" steel rims that some are
using have acceptable ride.
Number 2 - 16.5 tires in the right rating, size and quality are
getting harder to find
JR Wright
78 Buskirk Stretch
Michigan
On Sep 15, 2012, at 1:50 AM, J A Holland wrote:
>
>
>
> HOWDY ;
>
> I have been following this thread with interest
>
> BUT
>
> I can't seem to grasp the concept of chancing
> the steel wheels into aluminum wheels `
>
> ~ Joe ~
>
> --
> /_]*[__][] *[__|] ~ * '73 TZE063V101887 ""
> O----------OO--]* ~ '78 TZE168V100234 ""
> " Joe & Lavelle " ""
> 'sweet home alebamy'
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] changing steel wheels to alum [message #184559 is a reply to message #184539] |
Sat, 15 September 2012 08:29 |
 |
jaholland
Messages: 565
Registered: June 2010
Location: Sweet Home Alebamy
Karma: 0
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Senior Member |
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~ BUT
How Can Steel Wheels
Be Changed Into
Aluminum Wheels ?
~ Still Confused ~
~ Joe ~
| powerjon wrote on Sat, 15 September 2012 01:38 |
Joe,
Number 1 - Ride, the new wheels are round and don't flex, that was the
first thing that I noticed. The new 16" steel rims that some are
using have acceptable ride.
Number 2 - 16.5 tires in the right rating, size and quality are
getting harder to find
JR Wright
78 Buskirk Stretch
Michigan
On Sep 15, 2012, at 1:50 AM, J A Holland wrote:
>
>
>
> HOWDY ;
>
> I have been following this thread with interest
>
> BUT
>
> I can't seem to grasp the concept of chancing
> the steel wheels into aluminum wheels `
>
> ~ Joe ~
>
> --
> /_]*[__][] *[__|] ~ * '73 TZE063V101887 ""
> O----------OO--]* ~ '78 TZE168V100234 ""
> " Joe & Lavelle " ""
> 'sweet home alebamy'
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GMCnet mailing list
Unsubscribe or Change List Options:
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|
/_]*[__][] *[__|] ~ * '73 TZE063V101887 "
"
O----------OO--]* ~ '78 TZE168V100234 "
"
" Joe & Lavelle " "
"
'sweet home alebamy'
|
|
|
|
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