What is everybody running for rear backspacing on a 20x10 wheel?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rex01atv · 08-09-2011, 08:17 PM

I have a 72 swb with bags and mini tubbed. I'm currently running 18x9 wheels with 4.50 bs on the rear and using 255/45/18 tires. I want to run 20x10 wheels but i dont know what bs to use?? I want them at least as deep as I have now with maybe a wider tire as well. Any suggestions??? I do want to be able to tuck the tire in the wheel well.

mxjunkie80 · 08-09-2011, 08:27 PM

Nice looking ride! Hey, I'm in Oregon also, actually looks like a neighborhood I know! Wondering if you could maybe answer some question as they come up as I put my truck together. It's my first.

rex01atv · 08-09-2011, 08:30 PM

ask anytime!

**screaminchevypickup** · 08-09-2011, 10:04 PM

I'm running a 5 inch bs on mine
Posted via Mobile Device

SCOTI · 08-09-2011, 10:41 PM

20x10's w/5.5" bs.

magwakeenercew2jh · 08-09-2011, 11:10 PM

In the rear, the Boss 338's are 6.225 BS. These shots show them with the 1" spacer (to clear the inner fender wells and bring them out a little).
Notice that the truck is up on stands on all four corners.

Not too radical running 275/45R20's.

The fronts are 20 x 8.5 . I can check the BS on those if you like.

rex01atv · 08-10-2011, 08:03 AM

screaminchevy: What size tires are you running in the rear for 5bs on wheels. Is that a original rearend or is it out of early model??

original-71 · 08-10-2011, 10:50 AM

heres mine with a 20X10 rear with 5.5" back sapce, bought them from a buddy and member that had bags on his blazer should tuck fine with that backspace, but dont quote me till you try it

big_al_71 · 08-10-2011, 11:18 AM

20x10 with a 5.5 bs coy wheel...

**lolife99** · 08-10-2011, 12:10 PM

18x9 with 4.5" BS = 20x10 with 5.5" BS (because the wheels are 1" wider)

**screaminchevypickup** · 08-10-2011, 01:02 PM

Quote:

Originally Posted by rex01atv

screaminchevy: What size tires are you running in the rear for 5bs on wheels. Is that a original rearend or is it out of early model??

Yes it's the 71-72 rear and the tire size is 275/40
Posted via Mobile Device

original-71 · 08-10-2011, 03:43 PM

Quote:

Originally Posted by screaminchevypickup

Yes it's the 71-72 rear and the tire size is 275/40
Posted via Mobile Device

do you have a closer picture of your rear wheel with the 5" bs ?

rex01atv · 08-10-2011, 07:45 PM

How close is the tire to the outside inner fender on the 5b.s. screamin chevy?? Maybe a pic could help me out??? Right now I have about 1/4 to the outside inner fender.

**screaminchevypickup** · 08-10-2011, 09:51 PM

Quote:

Originally Posted by rex01atv

How close is the tire to the outside inner fender on the 5b.s. screamin chevy?? Maybe a pic could help me out??? Right now I have about 1/4 to the outside inner fender.

these are the only pics i have hope it helps!!

chevytruckluver · 08-10-2011, 11:45 PM

Quote:

Originally Posted by rex01atv

I have a 72 swb with bags and mini tubbed. I'm currently running 18x9 wheels with 4.50 bs on the rear and using 255/45/18 tires. I want to run 20x10 wheels but i dont know what bs to use?? I want them at least as deep as I have now with maybe a wider tire as well. Any suggestions??? I do want to be able to tuck the tire in the wheel well.

Hi Rex, are the current wheels Coys C-57?

rex01atv · 08-11-2011, 07:55 AM

No, boyd rallye wheels. I will be selling them soon to buy bonspeed vinspeed wheels instead. thanks for the pics guys!

Ackattack · 08-11-2011, 08:13 AM

I have 5.75" BS with a 315/35/20 rear tire. It's a very very close fit with the air bags dumped.

rex01atv · 08-11-2011, 09:00 PM

good picture!

1moretoy · 08-13-2011, 06:24 PM

Quote:

Originally Posted by Ackattack

I have 5.75" BS with a 315/35/20 rear tire. It's a very very close fit with the air bags dumped.

do you have any pix from the rear and maybe a profile pic. Im going to get
20x10 coys and nitto drag radial's same size tire. you think I should go with a 5 or 5.5 bs so its not as close

Theboatandcarman · 07-12-2017, 10:01 PM

Any chance we could update that photo??

Andy4639 · 07-12-2017, 10:32 PM

My 71 with info. 5.5 with 1/2" spacer as well for inner fender.

08-09-2011, 08:17 PM	#1
rex01atv Registered User Join Date: Apr 2007 Location: OR Posts: 198	What is everybody running for rear backspacing on a 20x10 wheel?? I have a 72 swb with bags and mini tubbed. I'm currently running 18x9 wheels with 4.50 bs on the rear and using 255/45/18 tires. I want to run 20x10 wheels but i dont know what bs to use?? I want them at least as deep as I have now with maybe a wider tire as well. Any suggestions??? I do want to be able to tuck the tire in the wheel well. Attached Images

08-09-2011, 08:27 PM	#2
mxjunkie80 Registered User Join Date: Aug 2011 Location: Gresham Oregon Posts: 62	Re: What is everybody running for rear backspacing on a 20x10 wheel?? Nice looking ride! Hey, I'm in Oregon also, actually looks like a neighborhood I know! Wondering if you could maybe answer some question as they come up as I put my truck together. It's my first.

08-09-2011, 08:30 PM	#3
rex01atv Registered User Join Date: Apr 2007 Location: OR Posts: 198	Re: What is everybody running for rear backspacing on a 20x10 wheel?? ask anytime!

08-09-2011, 10:04 PM	#4
screaminchevypickup Laid Back Join Date: Apr 2010 Location: mcloud ok Posts: 2,658	Re: What is everybody running for rear backspacing on a 20x10 wheel?? I'm running a 5 inch bs on mine Posted via Mobile Device __________________ 72 chevy swb Direct dealers for.. Vintage Air, Porterbuilt, Billet Specialties,Budnik wheels ,eddie motorsports, raceline wheels, intro wheels, Dakota Digital, precision, unisteer, Trimparts, and many many more... Laid Back Recreations.. Full restoration shop and full paint and body.. Kyle http://67-72chevytrucks.com/vboard/s...d.php?t=574629

08-09-2011, 10:41 PM	#5
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,094	Re: What is everybody running for rear backspacing on a 20x10 wheel?? 20x10's w/5.5" bs. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

08-09-2011, 11:10 PM	#6
magwakeenercew2jh RAT1968 '68 Cab/'71 Parts Join Date: Feb 2002 Location: Coarsegold, CA Posts: 2,375	Re: What is everybody running for rear backspacing on a 20x10 wheel?? In the rear, the Boss 338's are 6.225 BS. These shots show them with the 1" spacer (to clear the inner fender wells and bring them out a little). Notice that the truck is up on stands on all four corners. Not too radical running 275/45R20's. The fronts are 20 x 8.5 . I can check the BS on those if you like. Attached Images __________________ M17 Coarsegold, CA RAT's shiny now. But always a rat. Last edited by magwakeenercew2jh; 08-09-2011 at 11:13 PM. Reason: Cain't spel

08-10-2011, 08:03 AM	#7
rex01atv Registered User Join Date: Apr 2007 Location: OR Posts: 198	Re: What is everybody running for rear backspacing on a 20x10 wheel?? screaminchevy: What size tires are you running in the rear for 5bs on wheels. Is that a original rearend or is it out of early model??

08-10-2011, 10:50 AM	#8
original-71 ///Relaxed Atmosphere Join Date: May 2010 Location: Houston,Tx Posts: 1,266	Re: What is everybody running for rear backspacing on a 20x10 wheel?? heres mine with a 20X10 rear with 5.5" back sapce, bought them from a buddy and member that had bags on his blazer should tuck fine with that backspace, but dont quote me till you try it Attached Images __________________ 71-Cheyenne Super (E.C.E Static Drop 4.5/7". Intro Rally's 20X8.5 5" B.S 255/35/20 (F) 20X10 5.25 B.S 275/35/20 (R) 87-Silverado Static Drop 5/7" Raceline Explosion 5 22X8.5 (F) 22X10 (R) hector _________________________________ 1971 Chevrolet Cheyenne Super 1987 Chevrolet Silverado 2006 Ford Mustang GT 2012 Toyota 4-Runner 2014 Dodge Ram 1500 Sport Crew Cab

08-10-2011, 11:18 AM	#9
big_al_71 Registered User Join Date: Jun 2008 Location: South Florida Posts: 11,375	Re: What is everybody running for rear backspacing on a 20x10 wheel?? 20x10 with a 5.5 bs coy wheel... Attached Images __________________ Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild

08-10-2011, 12:10 PM	#10
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,703	Re: What is everybody running for rear backspacing on a 20x10 wheel?? 18x9 with 4.5" BS = 20x10 with 5.5" BS (because the wheels are 1" wider) __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

08-10-2011, 07:45 PM	#13
rex01atv Registered User Join Date: Apr 2007 Location: OR Posts: 198	Re: What is everybody running for rear backspacing on a 20x10 wheel?? How close is the tire to the outside inner fender on the 5b.s. screamin chevy?? Maybe a pic could help me out??? Right now I have about 1/4 to the outside inner fender.

08-11-2011, 07:55 AM	#16
rex01atv Registered User Join Date: Apr 2007 Location: OR Posts: 198	Re: What is everybody running for rear backspacing on a 20x10 wheel?? No, boyd rallye wheels. I will be selling them soon to buy bonspeed vinspeed wheels instead. thanks for the pics guys!

08-11-2011, 08:13 AM	#17
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	Re: What is everybody running for rear backspacing on a 20x10 wheel?? I have 5.75" BS with a 315/35/20 rear tire. It's a very very close fit with the air bags dumped. __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

08-11-2011, 09:00 PM	#18
rex01atv Registered User Join Date: Apr 2007 Location: OR Posts: 198	Re: What is everybody running for rear backspacing on a 20x10 wheel?? good picture!

07-12-2017, 10:01 PM	#20
Theboatandcarman Registered User Join Date: Aug 2015 Location: Harleysville, PA Posts: 398	Re: What is everybody running for rear backspacing on a 20x10 wheel?? Any chance we could update that photo?? __________________ keep on building. http://67-72chevytrucks.com/vboard/s...d.php?t=680094 2017 GMC Canyon diesel 1968 Chevrolet C20 1970 Mercedes 280S (WTB 1968 4wd barn door suburban)



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07-12-2017, 10:32 PM	#21
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: What is everybody running for rear backspacing on a 20x10 wheel?? My 71 with info. 5.5 with 1/2" spacer as well for inner fender. Attached Images __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

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