Home » Public Forums » GMCnet » 16" 8 Lug Steel Wheel with 80mm calipers
| 16" 8 Lug Steel Wheel with 80mm calipers [message #279344] |
Mon, 08 June 2015 09:50  |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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I'm currently changing to 80mm calipers, after a catastrophic hub/knuckle failure.
Test fitted the 80mm caliper and installed the 16" Steel Rim this morning. The final answer;
"It's fits."
You do have to grind the nub down on the caliper, as someone else posted, and trial fit the caliper. I had to remove a very little bit of the caliper or hub (less than 1/16") in one spot to allow the 80mm caliper to seat against the hub.
There is plenty of clearance between the rim and the body of the caliper.
"Photos at 10"
Now, back out in the 80+ Summer Heat.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] 16" 8 Lug Steel Wheel with 80mm calipers [message #279347 is a reply to message #279344] |
Mon, 08 June 2015 10:02  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Thomas, yes it will fit, BUT NOT ALWAYS. If you have the correct
combination of worn rotors, pads, and an 80 MM caliper that does not have
any funny lumps of cast iron in the wrong places it will fit as you have
described. But with new rotors and pads, not likely that everything will
clear without massaging something for clearance. Done several of these with
steel wheels, so I have been there and done that. Just try to find some
good straight and true steel wheels from the 90's.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Mon, Jun 8, 2015 at 7:50 AM, Thomas Phipps wrote:
> I'm currently changing to 80mm calipers, after a catastrophic hub/knuckle
> failure.
> Test fitted the 80mm caliper and installed the 16" Steel Rim this
> morning. The final answer;
> "It's fits."
> You do have to grind the nub down on the caliper, as someone else posted,
> and trial fit the caliper. I had to remove a very little bit of the caliper
> or hub (less than 1/16") in one spot to allow the 80mm caliper to seat
> against the hub.
> There is plenty of clearance between the rim and the body of the caliper.
> "Photos at 10"
>
> Now, back out in the 80+ Summer Heat.
> Tom, MS II
> --
> 1975 GMC Avion
> KA4CSG
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] 16" 8 Lug Steel Wheel with 80mm calipers [message #279348 is a reply to message #279347] |
Mon, 08 June 2015 10:31 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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I realize that as we massage the aging beauty queens, that there are trials and fits to play with. Mine appear to fit, your mileage may vary.
I do have Large Truck Rims, as opposed to the Dually Truck Rims (different part numbers). I do not know what the major difference's are, but the Large Truck Rims use the brass oval shaped truck style valve stems, as opposed to passenger rubber valve stems. There may be other subtle differences at play.
I am pleased with this experiment.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] 16" 8 Lug Steel Wheel with 80mm calipers [message #279350 is a reply to message #279348] |
Mon, 08 June 2015 10:45 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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I ran a set of steel 16" wheels from 2009 until 2014 when I changed to
Eagle Alloy wheels and a new set of B.F. Goodrich Load Range E T/A Radials.
They can and do work. I had to make a set of hub extensions and spacers to
allow the clearance necessary on the front calipers. But, like I said, I
had new calipers, rotors and heavy duty extra thick semi metallic pads.
You have to love these old machines to put up with some of the
inconsistencies in their manufacture.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Mon, Jun 8, 2015 at 8:31 AM, Thomas Phipps wrote:
> I realize that as we massage the aging beauty queens, that there are
> trials and fits to play with. Mine appear to fit, your mileage may vary.
> I do have Large Truck Rims, as opposed to the Dually Truck Rims (different
> part numbers). I do not know what the major difference's are, but the
> Large Truck Rims use the brass oval shaped truck style valve stems, as
> opposed to passenger rubber valve stems. There may be other subtle
> differences
> at play.
> I am pleased with this experiment.
> Tom, MS II
> --
> 1975 GMC Avion
> KA4CSG
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] 16" 8 Lug Steel Wheel with 80mm calipers [message #279364 is a reply to message #279350] |
Mon, 08 June 2015 14:09 |
biggreen
Messages: 347
Registered: June 2011
Location: Northeast Florida
Karma: 1
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James Hupy wrote on Mon, 08 June 2015 10:45I ran a set of steel 16" wheels from 2009 until 2014 when I changed to
Eagle Alloy wheels and a new set of B.F. Goodrich Load Range E T/A Radials.
They can and do work. I had to make a set of hub extensions and spacers to
allow the clearance necessary on the front calipers. But, like I said, I
had new calipers, rotors and heavy duty extra thick semi metallic pads.
You have to love these old machines to put up with some of the
inconsistencies in their manufacture.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Mon, Jun 8, 2015 at 8:31 AM, Thomas Phipps wrote:
> I realize that as we massage the aging beauty queens, that there are
> trials and fits to play with. Mine appear to fit, your mileage may vary.
> I do have Large Truck Rims, as opposed to the Dually Truck Rims (different
> part numbers). I do not know what the major difference's are, but the
> Large Truck Rims use the brass oval shaped truck style valve stems, as
> opposed to passenger rubber valve stems. There may be other subtle
> differences
> at play.
> I am pleased with this experiment.
> Tom, MS II
> --
> 1975 GMC Avion
> KA4CSG
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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Unsubscribe or Change List Options:
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2009? I have been searching for a set of steel 16" wheels and have been told here that only wheels from 1977-1988 will work. A clarification would be appreciated. Thanks
R.D.
Northeast Florida
77 ex-Palm Beach 403
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| Re: [GMCnet] 16" 8 Lug Steel Wheel with 80mm calipers [message #279373 is a reply to message #279364] |
Mon, 08 June 2015 15:57 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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I think Jim meant when he installed 16" steel rims, not the year of manufacture of the rims. You have been given the correct years for the correct shape of the center of the rim. Bowl-shaped is the correct version. The later cone shaped ones will not clear the knuckle/hub combination, however, they will work for the rear 4 wheels.
Good luck on finding them. Even here in the Deep South, where people keep their vehicles until they die of rust, the wheels are scarce. I have not found any, even doing wide area searches on Craig's List.
I did write an e-mail tp a potential GMC purchaser wishing to convert to 16" rims and tires, that a cost effective way would be to purchase a set of Alcoa or Eagle for the front pair, and find 4 16" Steel cone shaped rims for the rear. This would lessen the upfront expense and get the coach mobile.
Then, after other things have been repaired, you could replace the 4 in the rear with the Alcoas or Eagles when you can budget for it.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] 16" 8 Lug Steel Wheel with 80mm calipers [message #279377 is a reply to message #279344] |
Mon, 08 June 2015 16:13 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Tom,
I did quite a bit of research into this subject a while back and came to the conclusion that I could not state DEFINITIVELY that the
80mm calipers would fit 16 inch steel wheels because of differences in the wheels AND calipers. IIRC the person asking the question
did not live in the USA and I was not going to say they would fit and have them buy the wheels and ship them to wherever they lived
only find out they didn't fit when they got there!
I would suggest you provide LOTS of details as to what wheels you used and where you got them, what calipers you used and where you
got them, what brake pads you used and where you got them and what mods you did to the caliper to make it fit.
BTW what does "Photos at 10" mean?
Regards,
Rob M.
The Pedantic Mechanic
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Thomas Phipps
Sent: Tuesday, June 09, 2015 12:51 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] 16" 8 Lug Steel Wheel with 80mm calipers
I'm currently changing to 80mm calipers, after a catastrophic hub/knuckle failure.
Test fitted the 80mm caliper and installed the 16" Steel Rim this morning. The final answer;
"It's fits."
You do have to grind the nub down on the caliper, as someone else posted, and trial fit the caliper. I had to remove a very little
bit of the caliper or hub (less than 1/16") in one spot to allow the 80mm caliper to seat against the hub.
There is plenty of clearance between the rim and the body of the caliper.
"Photos at 10"
Now, back out in the 80+ Summer Heat.
Tom
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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] 16" 8 Lug Steel Wheel with 80mm calipers [message #279381 is a reply to message #279377] |
Mon, 08 June 2015 17:11 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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"Photos at 10" means that I was not ready to up-load them yet. Still chasing parts, rest of order might be here tomorrow. DOT 5 brake fluid is not here yet. Just one of those GMC projects.
I agree that one cannot make a blanket statement that 80mm will fit under 16" Steel Wheels. That is the big reason that I did not acquire all of the parts at one time. I wanted a "fit" test first.
If you did not live in the US, I would never recommend chasing or even attempting to chase 16" Steel Wheels. Life is too short.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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