6-lug Wheels - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**special-K** · 10-30-2014, 06:00 AM

Ok, by now we all know now about the 3 nubs = drum brake/4 nubs = disc brake difference in these wheels. Now I have another difference I never realized existed. Some wheels are offset (back spaced) 1/4" more than others. I have no idea why or which vehicles got these different wheels. I believe these larger back space wheels were from later, because the one wheel I noticed this on was argent color. I didn't know where to put this since these wheels come from various years, but it's pre-72s that everyone is using these wheels on these days. Does anyone have a clue?

Lou Boffa · 10-30-2014, 12:53 PM

hmmm...sounds like a Zen thing, Special K. Your knowledge is spot on. If you dont know it, it may be un-knowable.

**too much stuff** · 10-30-2014, 07:28 PM

I thought the 3 nub drum brake wheels were different offset than the 4 nub. If you don't know for sure and i don't know for sure, than we both don't know for sure........

**michael bustamante** · 10-30-2014, 07:39 PM

Great now i gotta go out and check the backspacing on My two 15x6s. Just gotta plant that seed in my brain huh special k?

**special-K** · 10-31-2014, 07:03 AM

I had no idea about this till I sold another member a pair last year and just recently had his powder coat guy spot the difference. It's barely detectable and the overall width is the same. Just 1/4" more back space. Why?? Right through '91 all 6-lug 10-bolts used the same brakes and everything about the configuration is the same. It's not like GM to make silly superficial changes. That's always been Ford's job.

67JimmyMO · 10-31-2014, 08:33 AM

Quote:

Originally Posted by special-K

...It's not like GM to make silly superficial changes. That's always been Ford's job.

Quoted for truth!

**special-K** · 10-31-2014, 08:24 PM

factorystock · 10-31-2014, 11:07 PM

Were the 6 lug wheels the '62-'70 versions or the '71-'87 versions? I have only noticed the different offset on 8 lug wheels, vans used the more positive offset ( hubcap closer to curb), while pickups used the more negative offset.

factorystock · 10-31-2014, 11:13 PM

Quote:

Originally Posted by special-K

It's not like GM to make silly superficial changes.

Good idea for a new thread, I can think of a few.

**special-K** · 11-01-2014, 05:44 AM

This wheel was a 6-lug 4-nub 15 x 6 from a '90 Blazer or Suburban, painted argent silver. Back space is 5.5" and 5.25" is what the others (white) were. These are measurements given by the fella with the wheels. Definitely 1/4" difference.

**IronCanine** · 11-03-2014, 10:08 PM

OK..Tim...sorry it took me a while to post these pics, but here's the argent wheel in question and a white one for comparison. It is identical to the other 6 lug, 15x6, 4 nub rims I have...other than the 1/4" difference in offset...and yes, I was mildly embarrassed that the powder coater noticed it practically immediately on the back of my truck jumbled in with all the other parts he was going to cook for me. I hope his eagle eye serves him that well when evaluating his work.

picklito · 06-19-2015, 11:15 PM

You say the argent wheel is from from a '90? That may be the difference... I was under the impression that it's the 73-87 wheel (white, 4-nub, 6-lug) that we look for. Maybe with the new body in 88 they changed offset a touch?

**special-K** · 06-21-2015, 10:21 PM

It was a '90 Suburban, same design as 73-87. The '88-up design (GMT400) put an end to hubcaps and began the era of styled wheel/center caps only

10-30-2014, 06:00 AM	#1
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	6-lug Wheels Ok, by now we all know now about the 3 nubs = drum brake/4 nubs = disc brake difference in these wheels. Now I have another difference I never realized existed. Some wheels are offset (back spaced) 1/4" more than others. I have no idea why or which vehicles got these different wheels. I believe these larger back space wheels were from later, because the one wheel I noticed this on was argent color. I didn't know where to put this since these wheels come from various years, but it's pre-72s that everyone is using these wheels on these days. Does anyone have a clue? __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

10-30-2014, 12:53 PM	#2
Lou Boffa Registered User Join Date: Jan 2013 Location: San Antonio, TX Posts: 733	Re: 6-lug Wheels hmmm...sounds like a Zen thing, Special K. Your knowledge is spot on. If you dont know it, it may be un-knowable. __________________ Figure out what you want--then figure out what you are willing to give up to get it.

10-30-2014, 07:28 PM	#3
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,701	Re: 6-lug Wheels I thought the 3 nub drum brake wheels were different offset than the 4 nub. If you don't know for sure and i don't know for sure, than we both don't know for sure........ __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

10-30-2014, 07:39 PM	#4
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,814	Re: 6-lug Wheels Great now i gotta go out and check the backspacing on My two 15x6s. Just gotta plant that seed in my brain huh special k? __________________ 1967custom

10-31-2014, 07:03 AM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: 6-lug Wheels I had no idea about this till I sold another member a pair last year and just recently had his powder coat guy spot the difference. It's barely detectable and the overall width is the same. Just 1/4" more back space. Why?? Right through '91 all 6-lug 10-bolts used the same brakes and everything about the configuration is the same. It's not like GM to make silly superficial changes. That's always been Ford's job. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

10-31-2014, 08:24 PM	#7
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: 6-lug Wheels __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

10-31-2014, 11:07 PM	#8
factorystock Registered User Join Date: Feb 2007 Location: west coast Posts: 3,353	Re: 6-lug Wheels Were the 6 lug wheels the '62-'70 versions or the '71-'87 versions? I have only noticed the different offset on 8 lug wheels, vans used the more positive offset ( hubcap closer to curb), while pickups used the more negative offset.

11-01-2014, 05:44 AM	#10
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: 6-lug Wheels This wheel was a 6-lug 4-nub 15 x 6 from a '90 Blazer or Suburban, painted argent silver. Back space is 5.5" and 5.25" is what the others (white) were. These are measurements given by the fella with the wheels. Definitely 1/4" difference. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

11-03-2014, 10:08 PM	#11
IronCanine I'm trying.... Join Date: Oct 2013 Location: Athens, GA Posts: 2,535	Re: 6-lug Wheels OK..Tim...sorry it took me a while to post these pics, but here's the argent wheel in question and a white one for comparison. It is identical to the other 6 lug, 15x6, 4 nub rims I have...other than the 1/4" difference in offset...and yes, I was mildly embarrassed that the powder coater noticed it practically immediately on the back of my truck jumbled in with all the other parts he was going to cook for me. I hope his eagle eye serves him that well when evaluating his work. Attached Images __________________ 1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076 1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352 1971 K20 Z84 https://67-72chevytrucks.com/vboard/...90#post9047290 1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555 "Sometimes I wonder if zander208 was even real..."

06-19-2015, 11:15 PM	#12
picklito Registered User Join Date: Sep 2013 Location: Vacaville CA Posts: 490	Re: 6-lug Wheels You say the argent wheel is from from a '90? That may be the difference... I was under the impression that it's the 73-87 wheel (white, 4-nub, 6-lug) that we look for. Maybe with the new body in 88 they changed offset a touch?

06-21-2015, 10:21 PM	#13
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: 6-lug Wheels It was a '90 Suburban, same design as 73-87. The '88-up design (GMT400) put an end to hubcaps and began the era of styled wheel/center caps only __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~



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