Bolt Pattern Question(s) (5 vs. 6) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72BlckButy · 10-09-2009, 04:12 PM

Guy's in know this is probably a stupid question, but I need to ask it.

Can a wheel be drilled to accomodate both a stock 5-lug ('71-72) setup as well as a 6-lug setup (67-70)?

I'm not referring to a spoke wheel design, but more of a custom drilled application. I wasn't sure if they would "cross" bolt patterns.

While we're at it, what are the bolt patterns for the 5-lug and 6-lug? IIRC, the 5-lug is 5 on 5, but I couldn't recall the 6-lug measurements.

Thanks in advance!

SCOTI · 10-09-2009, 04:34 PM

Quote:

Originally Posted by 72BlckButy

Guy's in know this is probably a stupid question, but I need to ask it.

Can a wheel be drilled to accomodate both a stock 5-lug ('71-72) setup as well as a 6-lug setup (67-70)?

I'm not referring to a spoke wheel design, but more of a custom drilled application. I wasn't sure if they would "cross" bolt patterns.

While we're at it, what are the bolt patterns for the 5-lug and 6-lug? IIRC, the 5-lug is 5 on 5, but I couldn't recall the 6-lug measurements.

Thanks in advance!

5x5" & 6x5.5" are the pattern dimensions.

From what I remember on my re-drilled axles & hubs, the machinist indicated you couldn't do a dual pattern set-up because some of the holes would interfere. I've never measured personally so it might be worth investigating (I've been told info before only to find it wasn't 100% correct).

72BlckButy · 10-09-2009, 04:39 PM

Scoti, thanks for the information. I kind of assumed the bolt patterns would cross. I will do some investigating to see if this is true.

Anyone have any experience with these measurements?

powell72 · 10-09-2009, 05:09 PM

I swear a buddy of mine said he talked to someone at Moser and they said it could be done, I'll ask him again.

72BlckButy · 10-09-2009, 05:39 PM

Chris that would be awesome!!!

tcb-1 · 10-09-2009, 05:41 PM

Nate,
I know I've seen 5 on 5 to 6 on 5.5 billet spacers. Let me verify though......

**lolife99** · 10-09-2009, 06:06 PM

Nate,... they will interfere with each other.
I stacked my 5-lug and 6-lug backspace tools on top of each other,... and there is always two of the 6-lug holes that interfere with the 5-lug holes.

72BlckButy · 10-09-2009, 06:17 PM

Well okay then.... bummer!

I thought I might be able to work more flexibility into the mix.

Thanks guys!

**lolife99** · 10-09-2009, 06:43 PM

You know how I feel about 6-lug vs 5-lug on the 67-72 trucks.
Just switch to 5-lug.
Then you have a ton of wheel choices!

westofb · 10-09-2009, 11:37 PM

Quote:

Originally Posted by lolife99

You know how I feel about 6-lug vs 5-lug on the 67-72 trucks.
Just switch to 5-lug.
Then you have a ton of wheel choices!

I would think you would have just as many wheel choices 6 vs 5....all the newer trucks have the same 6 lug pattern that your truck does! By the way what wheels were you wanting to redrill?

72BlckButy · 10-10-2009, 10:44 PM

That is still to be determined....

Anyone else have any experience w/ this?

powell72 · 10-10-2009, 11:46 PM

Quote:

Originally Posted by lolife99

Nate,... they will interfere with each other.
I stacked my 5-lug and 6-lug backspace tools on top of each other,... and there is always two of the 6-lug holes that interfere with the 5-lug holes.

That's good to know, I asked my buddy about it and he verified the guy at Moser said it would work. That's kinda scary, you would think someone working there would know something like that!

**lolife99** · 10-10-2009, 11:51 PM

Chris,... I wonder if the guy from Mosers is thinking about "welding up" the 6-lug pattern and changing to 5-lug? (or vice versa)

powell72 · 10-11-2009, 12:09 AM

Quote:

Originally Posted by lolife99

Chris,... I wonder if the guy from Mosers is thinking about "welding up" the 6-lug pattern and changing to 5-lug? (or vice versa)

Yeah, we were wondering (hoping) he just didn't understand exactly what my buddy was asking.

**lolife99** · 10-11-2009, 12:45 AM

Nate,..
Here's my 6-lug backspace tool stacked on top of my 5-lug backspace tool.

I have marked the tool lug holes that intersect each other. No matter how I position the two patterns,... they cross each other somewhere on the pattern.

EDIT:
My 5-lug tool has 2 different patterns on it. (5x5 and 5x4.750)
This picture shows the 6-lug pattern interfering with one hole on each of the 5-lug patterns.
Anyway I try to combine the two,... I can't make it work.

72BlckButy · 10-11-2009, 12:57 AM

Thanks for the pic Keith!

Debate resolved.

**N2TRUX** · 10-11-2009, 12:06 PM

Quote:

Originally Posted by westofb

I would think you would have just as many wheel choices 6 vs 5....all the newer trucks have the same 6 lug pattern that your truck does!

While this correct in that the 6 lug pattern is the same, it still doesn't give you a big selection of wheels that will fit. Most of the wheels designed to fit the new trucks will have incorrect backspace to fit early 6 lug trucks.

**lolife99** · 10-11-2009, 01:03 PM

And the cener bore of the wheel is too small.

Deenice21 · 12-27-2009, 07:15 PM

what is the most backspacing a 6 lug 67-72 truck could get away with ? i know 4.5 will work but will 6.18 backspacing fit???

**lolife99** · 12-27-2009, 10:14 PM

Quote:

Originally Posted by Deenice21

what is the most backspacing a 6 lug 67-72 truck could get away with ? i know 4.5 will work but will 6.18 backspacing fit???

Backspace will depend on wheel diameter.

And the width of the rim will determine if the wheel will tuck under the fenders or stick outside the wheelwell opening.

redbaron69 · 12-27-2009, 10:20 PM

nate but why? you have one of the nicest looking trucks on the board

drive and enjoy it!!!!

10-09-2009, 04:12 PM	#1
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Bolt Pattern Question(s) (5 vs. 6) Guy's in know this is probably a stupid question, but I need to ask it. Can a wheel be drilled to accomodate both a stock 5-lug ('71-72) setup as well as a 6-lug setup (67-70)? I'm not referring to a spoke wheel design, but more of a custom drilled application. I wasn't sure if they would "cross" bolt patterns. While we're at it, what are the bolt patterns for the 5-lug and 6-lug? IIRC, the 5-lug is 5 on 5, but I couldn't recall the 6-lug measurements. Thanks in advance! __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

10-09-2009, 04:39 PM	#3
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: Bolt Pattern Question(s) (5 vs. 6) Scoti, thanks for the information. I kind of assumed the bolt patterns would cross. I will do some investigating to see if this is true. Anyone have any experience with these measurements? __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

10-09-2009, 05:09 PM	#4
powell72 Senior Member Join Date: Jan 2005 Location: Loveland Co. Posts: 3,098	Re: Bolt Pattern Question(s) (5 vs. 6) I swear a buddy of mine said he talked to someone at Moser and they said it could be done, I'll ask him again. __________________ Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html

10-09-2009, 05:39 PM	#5
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: Bolt Pattern Question(s) (5 vs. 6) Chris that would be awesome!!! __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

10-09-2009, 05:41 PM	#6
tcb-1 Nothing to see here..... Join Date: Jun 2007 Location: Shawnee, KS Posts: 4,625	Re: Bolt Pattern Question(s) (5 vs. 6) Nate, I know I've seen 5 on 5 to 6 on 5.5 billet spacers. Let me verify though...... __________________ Doug THANK YOU to our American Soldiers & Veterans - POW MIA "You will NEVER be forgotten". The democracy will cease to exist when you take away from those who are willing to work and give to those who would not. Thomas Jefferson

10-09-2009, 06:06 PM	#7
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,701	Re: Bolt Pattern Question(s) (5 vs. 6) Nate,... they will interfere with each other. I stacked my 5-lug and 6-lug backspace tools on top of each other,... and there is always two of the 6-lug holes that interfere with the 5-lug holes. __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

10-09-2009, 06:17 PM	#8
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: Bolt Pattern Question(s) (5 vs. 6) Well okay then.... bummer! I thought I might be able to work more flexibility into the mix. Thanks guys! __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package) Last edited by 72BlckButy; 10-09-2009 at 06:17 PM.

10-09-2009, 06:43 PM	#9
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,701	Re: Bolt Pattern Question(s) (5 vs. 6) You know how I feel about 6-lug vs 5-lug on the 67-72 trucks. Just switch to 5-lug. Then you have a ton of wheel choices! __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

10-10-2009, 10:44 PM	#11
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: Bolt Pattern Question(s) (5 vs. 6) That is still to be determined.... Anyone else have any experience w/ this? __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

10-10-2009, 11:51 PM	#13
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,701	Re: Bolt Pattern Question(s) (5 vs. 6) Chris,... I wonder if the guy from Mosers is thinking about "welding up" the 6-lug pattern and changing to 5-lug? (or vice versa) __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

10-11-2009, 12:45 AM	#15
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,701	Re: Bolt Pattern Question(s) (5 vs. 6) Nate,.. Here's my 6-lug backspace tool stacked on top of my 5-lug backspace tool. I have marked the tool lug holes that intersect each other. No matter how I position the two patterns,... they cross each other somewhere on the pattern. EDIT: My 5-lug tool has 2 different patterns on it. (5x5 and 5x4.750) This picture shows the 6-lug pattern interfering with one hole on each of the 5-lug patterns. Anyway I try to combine the two,... I can't make it work. Attached Images __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 10-11-2009 at 12:50 AM.

10-11-2009, 12:57 AM	#16
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: Bolt Pattern Question(s) (5 vs. 6) Thanks for the pic Keith! Debate resolved. __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

10-11-2009, 01:03 PM	#18
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,701	Re: Bolt Pattern Question(s) (5 vs. 6) And the cener bore of the wheel is too small. __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

12-27-2009, 07:15 PM	#19
Deenice21 Registered User Join Date: Aug 2008 Location: miami Posts: 118	Re: Bolt Pattern Question(s) (5 vs. 6) what is the most backspacing a 6 lug 67-72 truck could get away with ? i know 4.5 will work but will 6.18 backspacing fit??? __________________ 1971 LWB C10 - 5.3/350 1970 SWB C10 - 5.3/4l60 or 6.2/4l80 not sure yet 1964 malibu ss - ls1/4l60 http://67-72chevytrucks.com/vboard/s...d.php?t=382403

12-27-2009, 10:20 PM	#21
redbaron69 Registered User Join Date: Jan 2009 Location: marion nc Posts: 588	Re: Bolt Pattern Question(s) (5 vs. 6) nate but why? you have one of the nicest looking trucks on the board drive and enjoy it!!!! __________________ 69 short fleet 350/350 "under construction" 70 short step 307/3 speed



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