Diffrences In Bolt Pattern - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tinsmith · 01-31-2010, 12:26 AM

Hey guys been a long time wallflower on here absorbing as much as possible. But I can't seem to figure out which models came with 5x5 bolt pattern or
5x4.75 bolt pattern. I have a 70 GMC originally 6 bolt but have just swaped in 71 5 bolt suspension. Everywhere that I have looked says that it is 5x5 but I have measured the wheel studs and it is 4.75 center to center. Were there two bolt patterns or am I measuring wrong?
Thanks

72BlckButy · 01-31-2010, 12:41 AM

5x5 for the '71-72 trucks

IIRC 5x4.75 was used on cars.

*highperf4x4* · 01-31-2010, 12:47 AM

Yeah 4.75 was for cars and S10 pickups.

You might have some Camaro rotors. If so, you need to make sure you have the right wheel bearings and calipers.

chevy_mike · 01-31-2010, 01:44 AM

Are you measuring like this for 5 lug? If not, that's your problem.

cdowns · 01-31-2010, 08:32 AM

good illustration

bigsnookmaster · 01-31-2010, 11:49 AM

X2

**Boog** · 01-31-2010, 11:56 AM

Chevy Mike's illustration looks crazy but that is the correct way to measure the bolt pattern size.
Once again: 5x5" for full size trucks
5x4.75" for cars and S10 trucks, blazers

Bruce88 · 01-31-2010, 12:21 PM

May be a full size bolt pattern picture you can print will help you figure out what you have. I generated one that can be found on my build thread (post #79) (read narrative for printing) http://67-72chevytrucks.com/vboard/s...=318544&page=4

From my understanding there is only three bolt patterns used on the 67 -72 trucks and there listed on the picture

Tinsmith · 01-31-2010, 12:57 PM

That is my problem then, Like I said I was going from center to center on the wheel studs. That makes me feel a lot better, not having to replace everything that I just did. Thanks Guys

01-31-2010, 12:26 AM	#1
Tinsmith Registered User Join Date: May 2009 Location: FSJ, B.C. Posts: 28	Diffrences In Bolt Pattern Hey guys been a long time wallflower on here absorbing as much as possible. But I can't seem to figure out which models came with 5x5 bolt pattern or 5x4.75 bolt pattern. I have a 70 GMC originally 6 bolt but have just swaped in 71 5 bolt suspension. Everywhere that I have looked says that it is 5x5 but I have measured the wheel studs and it is 4.75 center to center. Were there two bolt patterns or am I measuring wrong? Thanks

01-31-2010, 12:41 AM	#2
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: Diffrences In Bolt Pattern 5x5 for the '71-72 trucks IIRC 5x4.75 was used on cars. __________________ -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)

01-31-2010, 12:47 AM	#3
highperf4x4 Account Suspended Join Date: Apr 2009 Location: Oklahoma City Posts: 4,709	Re: Diffrences In Bolt Pattern Yeah 4.75 was for cars and S10 pickups. You might have some Camaro rotors. If so, you need to make sure you have the right wheel bearings and calipers. Last edited by highperf4x4; 01-31-2010 at 12:49 AM.

01-31-2010, 01:44 AM	#4
chevy_mike Never Ending Projects Join Date: Jul 2006 Location: San Diego, CA Posts: 3,836	Re: Diffrences In Bolt Pattern Are you measuring like this for 5 lug? If not, that's your problem. __________________ . 1965 C10 Panel, Tiki Express http://www.67-72chevytrucks.com/vboa...d.php?t=506580 SOLD 1968 Chevy C10, Long, Fleetside, Hot Rod Hauler http://67-72chevytrucks.com/vboard/s...d.php?t=313233 SOLD 1965 Chevy C10, Long, Fleetside, Hot Rod C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415702 SOLD We were given two ears and one mouth for a reason... listen twice as much and speak half as often...

01-31-2010, 08:32 AM	#5
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Diffrences In Bolt Pattern good illustration __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

01-31-2010, 11:49 AM	#6
bigsnookmaster Registered User Join Date: Jan 2008 Location: St.Petersburg,Fl Posts: 1,267	Re: Diffrences In Bolt Pattern X2 __________________ greg http://community.webshots.com/user/68406Stepside

01-31-2010, 11:56 AM	#7
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,187	Re: Diffrences In Bolt Pattern Chevy Mike's illustration looks crazy but that is the correct way to measure the bolt pattern size. Once again: 5x5" for full size trucks 5x4.75" for cars and S10 trucks, blazers __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

01-31-2010, 12:21 PM	#8
Bruce88 Registered User Join Date: Oct 2008 Location: Everett, WA Posts: 326	Re: Diffrences In Bolt Pattern May be a full size bolt pattern picture you can print will help you figure out what you have. I generated one that can be found on my build thread (post #79) (read narrative for printing) http://67-72chevytrucks.com/vboard/s...=318544&page=4 From my understanding there is only three bolt patterns used on the 67 -72 trucks and there listed on the picture __________________ My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=318544

01-31-2010, 12:57 PM	#9
Tinsmith Registered User Join Date: May 2009 Location: FSJ, B.C. Posts: 28	Re: Diffrences In Bolt Pattern That is my problem then, Like I said I was going from center to center on the wheel studs. That makes me feel a lot better, not having to replace everything that I just did. Thanks Guys

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