18" Front And 20" Back Offset Q... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevjayfsd · 05-29-2003, 04:11 PM

What kind of backspacing do i need for 18x8 front wheels tuck??

What kind of backspacing do i need for 20x10 rear wheels to tuck??

Does any one have any pics of Our trucks with Boyd Coddington Smoothies???

Thanks all.
Jason

Smooth68 · 05-29-2003, 04:29 PM

Not with Boyd smoothies but I've got some pics with 18f/20r combo.

chevjayfsd · 05-29-2003, 04:38 PM

OK LEts See all 18/20 combo trucks!!!!

Smooth68 · 05-29-2003, 05:00 PM

here's one view -

Smooth68 · 05-29-2003, 05:01 PM

another -

slogo · 05-29-2003, 06:06 PM

what about the back spacing??

Crank · 05-29-2003, 06:48 PM

That's not an 18/20 combo. It's an 18/22 combo. Trust me.

Brandon

SCOTI · 05-29-2003, 07:08 PM

I have 18x8 w/5.25 backspace TT 2's on front & 255/45/18" Dunlops. The front a-arm does require slight trimming (just a little more than what was already trimmed for the drop spindles). With this size, the front looks like the offset of a stock 7" corvette/monte carlo ralley wheel, only it adds 1" to the inside.

Out back, 20x10 w/6" backspace & 295/40/20's & this adds 2" to the width/offset of a stock corvette or truck 8" ralley. My bed was tubbed for big mickeys long ago so they fit w/o issue, but I also installed this combo on my 68 beater w/stock disc upgrade & uncut front a-arms & then just removed the stock rear tubs (the wood was already gone) & drove part of the the 01 power tour w/o any problems.

slogo · 05-29-2003, 07:25 PM

SCOTI, got any pics of your ride sounds sweet we wanna seeeee!

chevjayfsd · 05-29-2003, 11:15 PM

ttt

Number98 · 05-30-2003, 09:08 AM

Im sure one of these guys should have some pictures of the Circus Wagon I think it was called. It was done by Jim Aust and Sport Truck and had 18's up front with 20's out back. The Artical said he had 4.5" front and rear backspacing and that truck could tuck them nice with the bags dumped. Maybe somebody can post him a pic of it.

Jason

SCOTI · 05-30-2003, 11:11 AM

Sorry, the only pics I have are just some 35mm & for some reason my scanner won't copy them.

I'm using the wheels on my 74 for now & will get some pics this week after I finish lowering it. My wheels also tucked deeper than Jim Austs 'circus wagon'. Using his backspace measurements would cause interference on the outside of my fenders, & I can't stand tires rubbing when there's an alternative.

05-29-2003, 04:11 PM	#1
chevjayfsd Project 7dos Join Date: Aug 2001 Location: Abilene, Texas Posts: 876	18" Front And 20" Back Offset Q... What kind of backspacing do i need for 18x8 front wheels tuck?? What kind of backspacing do i need for 20x10 rear wheels to tuck?? Does any one have any pics of Our trucks with Boyd Coddington Smoothies??? Thanks all. Jason __________________ 7DOS - 1972 C-10 350/350 Porterbuilt/Accuair 20x8.5/20x10 Ride Low or Die PSSST - Yes it's bagged. 7dos build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=610290

05-29-2003, 04:29 PM	#2
Smooth68 Registered User Join Date: Aug 2001 Location: West Fork, Arkansas - Razorback Country Posts: 1,826	Not with Boyd smoothies but I've got some pics with 18f/20r combo. __________________ Smooth68's Web Site WTB 64-66 project or frame/cab, SWB or LWB...I have the fever! Whatcha got?? '68 Short Step - Shaved Body, Soon Bagged - *SOLD* Driver-2004 GMC Z-71 Ext-cab

05-29-2003, 04:38 PM	#3
chevjayfsd Project 7dos Join Date: Aug 2001 Location: Abilene, Texas Posts: 876	OK LEts See all 18/20 combo trucks!!!! __________________ 7DOS - 1972 C-10 350/350 Porterbuilt/Accuair 20x8.5/20x10 Ride Low or Die PSSST - Yes it's bagged. 7dos build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=610290

05-29-2003, 05:00 PM	#4
Smooth68 Registered User Join Date: Aug 2001 Location: West Fork, Arkansas - Razorback Country Posts: 1,826	here's one view - Attached Images __________________ Smooth68's Web Site WTB 64-66 project or frame/cab, SWB or LWB...I have the fever! Whatcha got?? '68 Short Step - Shaved Body, Soon Bagged - *SOLD* Driver-2004 GMC Z-71 Ext-cab

05-29-2003, 05:01 PM	#5
Smooth68 Registered User Join Date: Aug 2001 Location: West Fork, Arkansas - Razorback Country Posts: 1,826	another - Attached Images __________________ Smooth68's Web Site WTB 64-66 project or frame/cab, SWB or LWB...I have the fever! Whatcha got?? '68 Short Step - Shaved Body, Soon Bagged - *SOLD* Driver-2004 GMC Z-71 Ext-cab

05-29-2003, 06:06 PM	#6
slogo Registered User Join Date: Mar 2003 Location: Morristown,TN Posts: 481	what about the back spacing??

05-29-2003, 06:48 PM	#7
Crank Registered User Join Date: Aug 2002 Location: Crittenden, KY Posts: 1,965	That's not an 18/20 combo. It's an 18/22 combo. Trust me. Brandon

05-29-2003, 07:08 PM	#8
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,071	I have 18x8 w/5.25 backspace TT 2's on front & 255/45/18" Dunlops. The front a-arm does require slight trimming (just a little more than what was already trimmed for the drop spindles). With this size, the front looks like the offset of a stock 7" corvette/monte carlo ralley wheel, only it adds 1" to the inside. Out back, 20x10 w/6" backspace & 295/40/20's & this adds 2" to the width/offset of a stock corvette or truck 8" ralley. My bed was tubbed for big mickeys long ago so they fit w/o issue, but I also installed this combo on my 68 beater w/stock disc upgrade & uncut front a-arms & then just removed the stock rear tubs (the wood was already gone) & drove part of the the 01 power tour w/o any problems. __________________ 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.*

05-29-2003, 07:25 PM	#9
slogo Registered User Join Date: Mar 2003 Location: Morristown,TN Posts: 481	SCOTI, got any pics of your ride sounds sweet we wanna seeeee!

05-29-2003, 11:15 PM	#10
chevjayfsd Project 7dos Join Date: Aug 2001 Location: Abilene, Texas Posts: 876	ttt __________________ 7DOS - 1972 C-10 350/350 Porterbuilt/Accuair 20x8.5/20x10 Ride Low or Die PSSST - Yes it's bagged. 7dos build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=610290

05-30-2003, 09:08 AM	#11
Number98 Prestige Worldwide Join Date: Feb 2001 Location: Worldwide Posts: 2,552	Im sure one of these guys should have some pictures of the Circus Wagon I think it was called. It was done by Jim Aust and Sport Truck and had 18's up front with 20's out back. The Artical said he had 4.5" front and rear backspacing and that truck could tuck them nice with the bags dumped. Maybe somebody can post him a pic of it. Jason

05-30-2003, 11:11 AM	#12
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,071	Sorry, the only pics I have are just some 35mm & for some reason my scanner won't copy them. I'm using the wheels on my 74 for now & will get some pics this week after I finish lowering it. My wheels also tucked deeper than Jim Austs 'circus wagon'. Using his backspace measurements would cause interference on the outside of my fenders, & I can't stand tires rubbing when there's an alternative. __________________ 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.*



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