how wide can you go - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1970C10truck · 03-22-2011, 09:55 PM

Its time for new wheels and tires for my 70 c10. The truck is a project street and strip toy. I am curious how wide I can go in the rear on the stock width axle and trailing arms. I don't mind cutting the bed I just want to avoid narrowing the axle or any complicated suspension modifications at this time. Truck is stock height at this point but will probably end up with a 4 inch drop or something in the neighborhood.
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djracer · 03-22-2011, 10:39 PM

you can put a huge tire under there you will just need a wheel with a ton of back spacing. I'm sure some one on here can tell you the actual width and wheel size. I know Hart Rod had a pretty big tire and wheel on his farm truck.

*stich626* · 03-22-2011, 11:24 PM

mine are 295/50/15 on 10"

1970C10truck · 03-23-2011, 12:22 AM

Quote:

Originally Posted by stich626

mine are 295/50/15 on 10"

That's what I had on my last truck but it was a 78. I want to go bigger like in the 14" or maybe a little wider if possible. If anyone can post a setup with Wheel dimensions bigger than 295/50 on a 15" wheel I would like hear about it. I was looking at the wheel vintiques 15X14 rallys but the back space doesnt seem anything close to what I need.
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djracer · 03-23-2011, 08:24 PM

I think you need like 7.5 inches of back spacing on a 12 inch wheel. I know you can fit a bigger tire than a 295/50/15.

Robertjust777 · 03-23-2011, 09:01 PM

what about the biggest on a step side without cutting the bed?

djracer · 03-23-2011, 09:20 PM

I don't know how wide these were but the frame wasn't modified.

limitedstreetoutlaw · 03-25-2011, 10:23 AM

Well here is what my truck had when i bought it they were 14'' wide wheels with like 9.5 back spacing with 15'' or 15.5'' wide m/t sportsmans on it nothing was cut other than the bed.I woupd think this about as wide as you can go if i remember corectly there was only like an inch or two from wheel/tire to springs.

limitedstreetoutlaw · 03-25-2011, 12:01 PM

And djracer you'r right it's 7.5 back spacing for a 12'' wide wheel thats what i am running on mine now 12'' wide welds with 7.5 back spacing with a 325/50/15 drag radial.

1970C10truck · 03-25-2011, 12:13 PM

Thanks for the info that was kind of what I was wanting to see.

limitedstreetoutlaw · 03-25-2011, 12:30 PM

You'r welcome

71chevytruckguy · 03-25-2011, 08:31 PM

I'm runnin a 28x11.50 on a 10" wheel with 4" backspacing. Took a little bit of hammerin on the inner fenders to make it fit

ProStreet68SB · 03-26-2011, 12:06 AM

Dad is running a 31"x18.5", only mod needed are than widening the wheel tubs and cutting the bed to fit said wheel tubs is finding a narrower spring.

ratrod67 · 03-26-2011, 08:33 AM

The widest I could fit with stock tubs was a 15x10 with 5 inch backspacing and a 315/60 Drag radial. Truck was lowered 6 inches in back.

dougminton · 05-09-2011, 12:41 PM

390/45R15 on 12 inch wide rally wheels.
Plenty of suspension clearance but the parking brake cable almost rubs.

Mack81 · 05-09-2011, 09:41 PM

What backspace on the teal truck?

dougminton · 05-10-2011, 07:42 AM

the backspacing is 8". I widened a 15x8 by 4".

Hottrucks · 05-10-2011, 08:02 AM

I did the same thing as Doug...I sent out a stock rally and had 4" off back spacing added it was like $50 a wheel...I have put the 31x18x15 M/T's on them with no issues except I had to relocate the E brake cable on the trailing arm.....I can't say if it will clear a stock spring since I'm bagged...but they do clear the outside ( bearly) dumped with a C notch....

I can't figure out how to move pics from my build and since I lost the old puter with the pics I can't repost them..but they're in my build including what I did to tub it

**Hart_Rod** · 05-11-2011, 09:33 PM

Quote:

Originally Posted by dougminton

390/45R15 on 12 inch wide rally wheels.
Plenty of suspension clearance but the parking brake cable almost rubs.

Doug - if you use the parking brake cables from a leaf spring truck, you will have plenty of clearance for your wheels.

I'm running 20 x 12's with a 7" BS (67-70 rear end). The tires are MT 31 x 16's.

dougminton · 05-12-2011, 12:36 PM

Quote:

Originally Posted by Hart_Rod

Doug - if you use the parking brake cables from a leaf spring truck, you will have plenty of clearance for your wheels.

Mine was originally a leaf truck.
What's different on a coil truck?

**Hart_Rod** · 05-12-2011, 12:41 PM

Quote:

Originally Posted by dougminton

Mine was originally a leaf truck.
What's different on a coil truck?

They are longer, which allows you to route them away from the wheels.

Camaro_nut2001 · 10-10-2011, 08:23 PM

I know this thread is a little old but what combo did you wind up goin with? I'm lookin to do about the same on my '69 short fleetside & want to run a 14" wheel.

03-22-2011, 09:55 PM	#1
1970C10truck Registered User Join Date: Aug 2010 Location: Redding California Posts: 72	how wide can you go Its time for new wheels and tires for my 70 c10. The truck is a project street and strip toy. I am curious how wide I can go in the rear on the stock width axle and trailing arms. I don't mind cutting the bed I just want to avoid narrowing the axle or any complicated suspension modifications at this time. Truck is stock height at this point but will probably end up with a 4 inch drop or something in the neighborhood. Posted via Mobile Device __________________ 1970 C10 swb 350 4spd under construction

03-22-2011, 10:39 PM	#2
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: how wide can you go you can put a huge tire under there you will just need a wheel with a ton of back spacing. I'm sure some one on here can tell you the actual width and wheel size. I know Hart Rod had a pretty big tire and wheel on his farm truck. __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

03-22-2011, 11:24 PM	#3
stich626 Account Suspended Join Date: Sep 2010 Location: hingham ma Posts: 1,721	Re: how wide can you go mine are 295/50/15 on 10"

03-23-2011, 08:24 PM	#5
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: how wide can you go I think you need like 7.5 inches of back spacing on a 12 inch wheel. I know you can fit a bigger tire than a 295/50/15. __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

03-23-2011, 09:01 PM	#6
Robertjust777 Registered User Join Date: Oct 2009 Location: Henderson Nv Posts: 151	Re: how wide can you go what about the biggest on a step side without cutting the bed?

03-23-2011, 09:20 PM	#7
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: how wide can you go I don't know how wide these were but the frame wasn't modified. __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole! Last edited by djracer; 03-23-2011 at 09:20 PM.

03-25-2011, 10:23 AM	#8
limitedstreetoutlaw Registered User Join Date: Jun 2009 Location: Arkoma OK Posts: 134	Re: how wide can you go Well here is what my truck had when i bought it they were 14'' wide wheels with like 9.5 back spacing with 15'' or 15.5'' wide m/t sportsmans on it nothing was cut other than the bed.I woupd think this about as wide as you can go if i remember corectly there was only like an inch or two from wheel/tire to springs. Attached Images __________________ Brandon Street Car Mafia Last edited by limitedstreetoutlaw; 03-26-2011 at 10:41 AM.

03-25-2011, 12:01 PM	#9
limitedstreetoutlaw Registered User Join Date: Jun 2009 Location: Arkoma OK Posts: 134	Re: how wide can you go And djracer you'r right it's 7.5 back spacing for a 12'' wide wheel thats what i am running on mine now 12'' wide welds with 7.5 back spacing with a 325/50/15 drag radial. __________________ Brandon Street Car Mafia Last edited by limitedstreetoutlaw; 03-25-2011 at 12:10 PM.

03-25-2011, 12:13 PM	#10
1970C10truck Registered User Join Date: Aug 2010 Location: Redding California Posts: 72	Re: how wide can you go Thanks for the info that was kind of what I was wanting to see. __________________ 1970 C10 swb 350 4spd under construction

03-25-2011, 12:30 PM	#11
limitedstreetoutlaw Registered User Join Date: Jun 2009 Location: Arkoma OK Posts: 134	Re: how wide can you go You'r welcome __________________ Brandon Street Car Mafia

03-25-2011, 08:31 PM	#12
71chevytruckguy Registered User Join Date: Jul 2005 Location: Kernersville, NC Posts: 599	Re: how wide can you go I'm runnin a 28x11.50 on a 10" wheel with 4" backspacing. Took a little bit of hammerin on the inner fenders to make it fit __________________ its a work in progess. 71 c-10 lwb, in the middle of frame off restoration. 69 c-10 swb, drag truck, 406 sbc, balanced, comp 292 cam, ported, polished, gasket matched, and bowl blended pro comp 210cc heads, 2.02/1.60 ferrea valves,1.6 roller rockers, re curved hei with msd 6al box, 2-step rev limter, accel 300+ wires, ported victor jr intake, holley 750 double pumper carb, dynomax 1 5/8 headers, 4 spd munci m-20 with super case and iron midplate, mr. gasket vertigate shifter, 5.38 pro gears with full spool, 33 spline moser axles and c-clip elimators, line-loc, 5 gal fuel cell, holley blue pump. 7.807 @ 88.37mph 1.60 60FT 80 g-20 van, tow rig, cammed 305, th350, 10 bolt 88 jeep wrangler, dd, 258, ax-15 swap, 4.5" lift, 33x12.50's, lockers, 3.55's

03-26-2011, 12:06 AM	#13
ProStreet68SB The Engine Whisperer Join Date: Sep 2006 Location: Ohio Posts: 770	Re: how wide can you go Dad is running a 31"x18.5", only mod needed are than widening the wheel tubs and cutting the bed to fit said wheel tubs is finding a narrower spring. __________________ -Automatics win races, 6-speeds impress high school kids -Save a tree, support your local dragstrip. -"Failure - The Secret To Success, the idea is that you can fail 100 times as long as you can succeed once" -Takeo Fukui columbuscarsandcoffee.net and on Facebook

03-26-2011, 08:33 AM	#14
ratrod67 Registered User Join Date: Sep 2002 Location: DFW Texas Posts: 2,269	Re: how wide can you go The widest I could fit with stock tubs was a 15x10 with 5 inch backspacing and a 315/60 Drag radial. Truck was lowered 6 inches in back. Attached Images

05-09-2011, 12:41 PM	#15
dougminton Registered User Join Date: Mar 2009 Location: norman okahoma Posts: 269	Re: how wide can you go 390/45R15 on 12 inch wide rally wheels. Plenty of suspension clearance but the parking brake cable almost rubs. Attached Images __________________ The TEAL GMC build thread is HERE 1972 GMC SWB 454 oval ports TH400 fastest 1/4 mile time so far 13.05 @ 104 If you think you have too much horsepower you obviously have a traction problem !

05-09-2011, 09:41 PM	#16
Mack81 Registered User Join Date: Aug 2010 Location: Tennessee Posts: 26	Re: how wide can you go What backspace on the teal truck? __________________ '68 C10 SWB "Purple Nurple"



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05-10-2011, 07:42 AM	#17
dougminton Registered User Join Date: Mar 2009 Location: norman okahoma Posts: 269	Re: how wide can you go the backspacing is 8". I widened a 15x8 by 4". __________________ The TEAL GMC build thread is HERE 1972 GMC SWB 454 oval ports TH400 fastest 1/4 mile time so far 13.05 @ 104 If you think you have too much horsepower you obviously have a traction problem !

05-10-2011, 08:02 AM	#18
Hottrucks Redefining LowBudget Join Date: Mar 2009 Location: lebanon Cow Hampshire Posts: 4,538	Re: how wide can you go I did the same thing as Doug...I sent out a stock rally and had 4" off back spacing added it was like $50 a wheel...I have put the 31x18x15 M/T's on them with no issues except I had to relocate the E brake cable on the trailing arm.....I can't say if it will clear a stock spring since I'm bagged...but they do clear the outside ( bearly) dumped with a C notch.... I can't figure out how to move pics from my build and since I lost the old puter with the pics I can't repost them..but they're in my build including what I did to tub it __________________ 1970 C10 CST fleetside 472 ....big dreams little cash... http://67-72chevytrucks.com/vboard/s...d.php?t=335721 SunShine Syndicate.. Mikes Sandwich Fair Run OCT 8th 2011 http://www.thesandwichfair.com/html/...auto_show.html

10-10-2011, 08:23 PM	#22
Camaro_nut2001 Chevy Lover Till The End. Join Date: Dec 2009 Location: Mascot TN. Posts: 795	Re: how wide can you go I know this thread is a little old but what combo did you wind up goin with? I'm lookin to do about the same on my '69 short fleetside & want to run a 14" wheel. __________________ 1969 Chevy SWB Big Block - Under the knife as of 12/26/2011 1989 Chevy Silverado, 4X4 - Daily Driver 1996 Chevy Suburban K1500 - 4-Wheeler, Campin Truck 1968 Chevrolet Impala Sport Coupe - 327/350hp, TH400, all original. Members I've met: BamaBaxter, My Build: http://67-72chevytrucks.com/vboard/s...d.php?t=500359

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