I went from 4.75 to 5" - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SnS C10 · 06-10-2009, 11:58 PM

As some of you know i picked up these centerline dragstars the other day. well i call the local machine shop to get the rotors/axles/drums redrilled. they referred me to another machine shop who specializes in changing bolt pattern. what they did was move each hole 1/8" outward on a fadal cnc. then, hardened steel knurled inserts were pressed into each hole. presto now i have a 5x5.0 pattern. the black under the lug is the insert. it looks a lot better than i thought it would. he says they are just as strong as before they were put in. this is the only operation this machine shop does by the way. i know it may be skeptical but it looked very good to me and they are holding up to the rubber burning 454 that i have so far. just thought you guys may want to see how it would look. it cost me 60$ for 4 rims and took a day to finish.

flamingbig10 · 06-11-2009, 12:09 AM

they look good but a fresh coat of gloss black on the drums and suspension would look real good

Keith Seymore · 06-11-2009, 07:49 AM

Why wasn't your bolt circle 5" originally?

I am thinking the production bolt pattern for these trucks (2wd) was "5 on 5".

K

63 & 64 Bowties · 06-11-2009, 07:55 AM

Quote:

Originally Posted by Keith Seymore

Why wasn't your bolt circle 5" originally?

I am thinking the production bolt pattern for these trucks (2wd) was "5 on 5".

K

that's what I was wondering too. I thought 4.75 was only cars and S-10's

**N2TRUX** · 06-11-2009, 08:44 AM

His bolt pattern was 5x5. He found a deal on these wheels that were 5x4,75 and wanted to convert his truck to fit. The machine shop converted his wheels instead.

Keith Seymore · 06-11-2009, 09:03 AM

Quote:

Originally Posted by N2TRUX

His bolt pattern was 5x5. He found a deal on these wheels that were 5x4,75 and wanted to convert his truck to fit. The machine shop converted his wheels instead.

Ah - I get it now. They changed the wheels, not the axle/rotor. Cool!

I'm probably a little slow on the uptake because we converted a '63 Tempest (from 4.5" to 4.75") but did the axles and rotors, so I was already thinking in that direction.

Thanks,

K

**N2TRUX** · 06-11-2009, 09:40 AM

That was his original idea that he expressed in another post. Fortunately he found a machine shop that made the conversion practical.

That 63 Tempest had an IRS didn't it?

Keith Seymore · 06-11-2009, 10:02 AM

Quote:

Originally Posted by N2TRUX

That 63 Tempest had an IRS didn't it?

Yes. They are a strange little car; front engine, trans is in the rear with a IRS swing axle, "rope" driveshaft.

K

06-10-2009, 11:58 PM	#1
SnS C10 Registered User Join Date: Jul 2004 Location: Lomita, Ca Posts: 1,225	I went from 4.75 to 5" As some of you know i picked up these centerline dragstars the other day. well i call the local machine shop to get the rotors/axles/drums redrilled. they referred me to another machine shop who specializes in changing bolt pattern. what they did was move each hole 1/8" outward on a fadal cnc. then, hardened steel knurled inserts were pressed into each hole. presto now i have a 5x5.0 pattern. the black under the lug is the insert. it looks a lot better than i thought it would. he says they are just as strong as before they were put in. this is the only operation this machine shop does by the way. i know it may be skeptical but it looked very good to me and they are holding up to the rubber burning 454 that i have so far. just thought you guys may want to see how it would look. it cost me 60$ for 4 rims and took a day to finish. Attached Images

06-11-2009, 12:09 AM	#2
flamingbig10 6.0 powered square Join Date: Feb 2008 Location: Mesquite texas Posts: 3,459	Re: I went from 4.75 to 5" they look good but a fresh coat of gloss black on the drums and suspension would look real good __________________ Aaron 1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot Build http://67-72chevytrucks.com/vboard/s...d.php?t=283326

06-11-2009, 07:49 AM	#3
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,178	Re: I went from 4.75 to 5" Why wasn't your bolt circle 5" originally? I am thinking the production bolt pattern for these trucks (2wd) was "5 on 5". K __________________ Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

06-11-2009, 08:44 AM	#5
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Re: I went from 4.75 to 5" His bolt pattern was 5x5. He found a deal on these wheels that were 5x4,75 and wanted to convert his truck to fit. The machine shop converted his wheels instead. __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

06-11-2009, 09:40 AM	#7
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Re: I went from 4.75 to 5" That was his original idea that he expressed in another post. Fortunately he found a machine shop that made the conversion practical. That 63 Tempest had an IRS didn't it? __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"



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