20x14 coys - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1moretoy · 07-30-2011, 08:11 PM

CAN I run 20x14 coys on the back of my 70 c10 without narrowing the frame rails. the truck was a short step now it a short fleet. If I can what backspace would I need. thanks

Zoomin · 07-30-2011, 10:53 PM

I doubt it, but call them. They know C10's real well.

1moretoy · 05-04-2012, 08:57 PM

Old thread but anyone know what I would need to make them fit. Thanks
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**Hart_Rod** · 05-05-2012, 10:21 AM

Quote:

Originally Posted by 1moretoy

Old thread but anyone know what I would need to make them fit. Thanks
Posted via Mobile Device

You'll have to narrow the rearend approximately 5" each side because Coys only offers them in a couple of back spacing options (5,4.5??). This wil probably necessitate some frame modifications, but I'm not sure exactly what. If you go with a wheel that offers more back spacing options, you could do it with out narrowing the rear. I have 20x12's (7" bs) on the back of my truck and the only modifications are widened tub and removed the bump stop bracket.
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BossHogg69 · 05-05-2012, 10:50 AM

I'm running 18x12's with 7" bs also - there is plenty of clearance between the inside of my wheels and the frame rails, easily 3+ inches. You could always get the Coys and have them widened toward the inside like I did with my Boss 338's. I will say that careful use of a measuring tape will be your best friend in trying to find out what will work on your particular truck.

okyankee · 05-05-2012, 11:19 AM

Quote:

Originally Posted by Hart_Rod

You'll have to narrow the rearend approximately 5" each side because Coys only offers them in a couple of back spacing options (5,4.5??). This wil probably necessitate some frame modifications, but I'm not sure exactly what. If you go with a wheel that offers more back spacing options, you could do it with out narrowing the rear. I have 20x12's (7" bs) on the back of my truck and the only modifications are widened tub and removed the bump stop bracket.
Posted via Mobile Device

what size tires are you running on the back?

**Hart_Rod** · 05-05-2012, 12:33 PM

Quote:

Originally Posted by BossHogg69

I'm running 18x12's with 7" bs also - there is plenty of clearance between the inside of my wheels and the frame rails, easily 3+ inches. You could always get the Coys and have them widened toward the inside like I did with my Boss 338's. I will say that careful use of a measuring tape will be your best friend in trying to find out what will work on your particular truck.

Who widened them for you?

Quote:

Originally Posted by okyankee

what size tires are you running on the back?

31 x 16 Mickey Thompso Sportsman Radial.
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BossHogg69 · 05-05-2012, 12:42 PM

www.weldcraftwheels.com

**Hart_Rod** · 05-05-2012, 01:16 PM

Quote:

Originally Posted by BossHogg69

www.weldcraftwheels.com

How much did you widen yours? How much did it cost?
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BossHogg69 · 05-05-2012, 10:37 PM

I went from 9.5" to 12" wide. $235 per wheel. They charge by the inch. Luckily I got the wheels on a group buy on this forum, so the cost of widening them didn't sting so much.

07-30-2011, 08:11 PM	#1
1moretoy Registered User Join Date: Jul 2008 Location: san jose ca Posts: 467	20x14 coys CAN I run 20x14 coys on the back of my 70 c10 without narrowing the frame rails. the truck was a short step now it a short fleet. If I can what backspace would I need. thanks

07-30-2011, 10:53 PM	#2
Zoomin Man of Mini-Talents Join Date: Sep 2009 Location: Oklahoma City, OK Posts: 4,295	Re: 20x14 coys I doubt it, but call them. They know C10's real well. __________________ Steve Project - Ruth 66 Skylark Project - Lola 60 Biscayne Project - Iron Ox 54 GMC 100 Project - Darth 69 Camaro

05-04-2012, 08:57 PM	#3
1moretoy Registered User Join Date: Jul 2008 Location: san jose ca Posts: 467	Re: 20x14 coys Old thread but anyone know what I would need to make them fit. Thanks Posted via Mobile Device

05-05-2012, 10:50 AM	#5
BossHogg69 motor exploder Join Date: Mar 2009 Location: Pittsburgh, PA Posts: 2,346	Re: 20x14 coys I'm running 18x12's with 7" bs also - there is plenty of clearance between the inside of my wheels and the frame rails, easily 3+ inches. You could always get the Coys and have them widened toward the inside like I did with my Boss 338's. I will say that careful use of a measuring tape will be your best friend in trying to find out what will work on your particular truck. __________________ Adam 1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac 1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's 1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac 2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80 2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac Use the SEARCH function on this forum - it is your friend!!

05-05-2012, 12:42 PM	#8
BossHogg69 motor exploder Join Date: Mar 2009 Location: Pittsburgh, PA Posts: 2,346	Re: 20x14 coys www.weldcraftwheels.com __________________ Adam 1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac 1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's 1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac 2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80 2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac Use the SEARCH function on this forum - it is your friend!!

05-05-2012, 10:37 PM	#10
BossHogg69 motor exploder Join Date: Mar 2009 Location: Pittsburgh, PA Posts: 2,346	Re: 20x14 coys I went from 9.5" to 12" wide. $235 per wheel. They charge by the inch. Luckily I got the wheels on a group buy on this forum, so the cost of widening them didn't sting so much. __________________ Adam 1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac 1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's 1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac 2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80 2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac Use the SEARCH function on this forum - it is your friend!!



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