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Old 01-25-2020, 09:32 AM   #1
88Stanger
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Will 15" x 10" wide rim with 4" backspace fit with stock rear?

I am building a 1966 short bed fleet side from the ground up and i am just wondering if a rim that is 15" x 10" wide with 4" backspace fit between the outer rear fenders? I can modify the bed and rear inner fender wells, just not sure if it will fit in between the outer fenders.
Sorry to ask, i have searched and searched and i cannot measure because the truck is completely apart.

Thanks to all who give feedback, very much appreciated.

Just a note, plan is fully bagged, tubular front a-arms, factory short bed, wood bed, fleet side, 383 full roller stroker, rebuilt muncie 4-speed and so on. build page coming....
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Old 01-25-2020, 10:07 PM   #2
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

Are you sure the BS is 4" and not 3.750"? The fitment is largely going to depend on the tire you mount on the wheel. The answer is yes a 15 x 10 wheel can work on a fleetside.
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Old 01-28-2020, 04:29 PM   #3
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

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Are you sure the BS is 4" and not 3.750"? The fitment is largely going to depend on the tire you mount on the wheel. The answer is yes a 15 x 10 wheel can work on a fleetside.
1st, Thank you sir for the super fast shipping, and great, no wait, awesome looking adapters! Thanks for your input here also.

Summit Racing has these with 4.5" Back space
Wheel Vintiques 12 Series Smoothie Wheels 12-5005042

Summit Racing has these with 4.0" Back Space
U.S. Wheel 68 Series Rat Rod Matte Black Wheels 68-5050

But i think that i want a much taller rim but would like the width and low profile tire, but not sure it will work with a bagged out 1966 C10 Fleetside with stock rear. I understand that may need to do something with the bed inner fenders, make them wider and i am ok with that, just not sure on the outside fender.
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Old 01-26-2020, 10:53 PM   #4
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

Quote:
Originally Posted by 88Stanger View Post
I am building a 1966 short bed fleet side from the ground up and i am just wondering if a rim that is 15" x 10" wide with 4" backspace fit between the outer rear fenders? I can modify the bed and rear inner fender wells, just not sure if it will fit in between the outer fenders.
Sorry to ask, i have searched and searched and i cannot measure because the truck is completely apart.

Thanks to all who give feedback, very much appreciated.

Just a note, plan is fully bagged, tubular front a-arms, factory short bed, wood bed, fleet side, 383 full roller stroker, rebuilt muncie 4-speed and so on. build page coming....
Thanks for asking the question. I'm looking at the same size rims on a 62 step side
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Old 01-27-2020, 10:37 PM   #5
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

The stepsides have less room for tire and wheel than a fleetside. You will not be able to use a off the shelf 10" wide wheel on a stepside with a stock width differential, if it is lowered.

Quote:
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Thanks for asking the question. I'm looking at the same size rims on a 62 step side
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Old 01-28-2020, 12:40 AM   #6
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

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Originally Posted by Captainfab View Post
The stepsides have less room for tire and wheel than a fleetside. You will not be able to use a off the shelf 10" wide wheel on a stepside with a stock width differential, if it is lowered.
Thanks Captain! I appreciate all the information you share.
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Old 02-11-2020, 01:15 PM   #7
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

Quote:
Originally Posted by Captainfab View Post
The stepsides have less room for tire and wheel than a fleetside. You will not be able to use a off the shelf 10" wide wheel on a stepside with a stock width differential, if it is lowered.
Quote:
Originally Posted by Todd46
Thanks for asking the question. I'm looking at the same size rims on a 62 step side.


Thanks Captain! I appreciate all the information you share
Todd46, you could do an easy(ish) mini-tub & fit 10's but would still want 6"bs so things clear. I've sold multiple sets of fleetside wheel tubs to step-side guys. Center & set them in place against the bedside wall & floor to mark the area the wood floor needs to be trimmed back. trim the floor. Mark & drill some holes. Some cutting & drilling & bolt the tubs in. You do lose bed space so 4x8 sheets of plywood would have to ride on top of the tubs but your truck can still do truck stuff.

Wheel Vintiques does custom back space set-ups for $25/wheel on top of their regular price (they did this for me in 2018).
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Old 01-29-2020, 12:13 AM   #8
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

Here is my stepside with 15x10 wheels.
http://67-72chevytrucks.com/vboard/s...85#post5455785
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Old 01-29-2020, 10:31 AM   #9
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

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Originally Posted by LostMy65 View Post
Here is my stepside with 15x10 wheels.
http://67-72chevytrucks.com/vboard/s...85#post5455785
Any idea what the Backspace is?

Im trying to figure out what is the max back space i can have is.
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Old 01-29-2020, 08:27 PM   #10
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

I think you would be better off with a five inch backspace and it will work.
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Old 01-29-2020, 09:39 PM   #11
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

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Originally Posted by 88Stanger View Post
Any idea what the Backspace is?

Im trying to figure out what is the max back space i can have is.
Sorry, I posted the wrong link.
Here you go:
http://67-72chevytrucks.com/vboard/s...71#post6772771
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Old 01-30-2020, 10:28 AM   #12
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

Quote:
Originally Posted by LostMy65 View Post
Sorry, I posted the wrong link.
Here you go:
http://67-72chevytrucks.com/vboard/s...71#post6772771
DAMN! I like the 12" rims, but if i read correctly, only 3 1/2" backspace?!?!
I would have thought that more backspace would have been better.
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Old 01-30-2020, 10:47 AM   #13
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

I have some 15x10 with a 295/50/15 with a three inch backspace and it’s way to tight.
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Old 01-29-2020, 09:36 PM   #14
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

Here's another option:
http://67-72chevytrucks.com/vboard/s...78#post8261978
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Old 01-30-2020, 11:31 AM   #15
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

Quote:
Originally Posted by 88Stanger View Post
I am building a 1966 short bed fleet side from the ground up and i am just wondering if a rim that is 15" x 10" wide with 4" backspace fit between the outer rear fenders? I can modify the bed and rear inner fender wells, just not sure if it will fit in between the outer fenders.
Sorry to ask, i have searched and searched and i cannot measure because the truck is completely apart.

Thanks to all who give feedback, very much appreciated.

Just a note, plan is fully bagged, tubular front a-arms, factory short bed, wood bed, fleet side, 383 full roller stroker, rebuilt muncie 4-speed and so on. build page coming....
No disrespect to the answers above but when it's on bags, things get different depending on how much is altered & how much drop it has.

My 64 short fleet has bags & the 'narrow' early truck arm 12bolt. There's NO WAY a 10" wheel w/4" BS would fit. I have 10" wide wheels w/5.5" BS & they still would not fit w/o cutting-up the inner bedside wall @ the seamed area.

In these included ride height mock-up pics, I now have a narrowed 9" housing (58" vs 62) installed. I utilized adapters to put on those 10" wheels w/5.5" BS:
Attached Images
  
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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.

Last edited by SCOTI; 01-30-2020 at 11:44 AM.
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Old 01-30-2020, 11:39 AM   #16
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

I switched to the narrowed rear housing specifically to allow using a 10" wide wheel w/4" BS & not have to cut up the inner bedside. The bed is also mini-tubbed to fit the rubber.
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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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Old 01-30-2020, 12:24 PM   #17
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

Quote:
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I switched to the narrowed rear housing specifically to allow using a 10" wide wheel w/4" BS & not have to cut up the inner bedside. The bed is also mini-tubbed to fit the rubber.
Please excuse my ignorance, but what is meant by narrow vs wide rearend?
PS thank you to all of you for these great responses.
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Old 01-30-2020, 12:52 PM   #18
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

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Please excuse my ignorance, but what is meant by narrow vs wide rearend?
PS thank you to all of you for these great responses.
The 'early' truck 12bolts changed width as disc brakes came along. At some point in '70, the rear ends started being made 1.5" wider vs. pre-'70. So, 63-69 rear ends were the narrow 12bolt. In 1970, as production started building things for the new '71 models (that would now have standard disc brakes up front), the housings were wider width but w/6-lug axles. Starting in '71, the axles changed to 5-lug.

Since these trucks are so old & parts are easily swapped between the years, you have to pay attention to what you have & not assume just because it's 'X' year model, it will work. From what I learned:

63-64 'narrow' 12-bolt 17-spline axles
65-69 'narrow' 12-bolt 31-spline axles
70 could be either the narrow or wider by 1.5" 12-bolt 31-spline axles
71-80 'wider' 12 bolt 31-spline axles

Any of the above from 63-72 could be truck-arm or leaf housings. The additional width was outboard of the T/A or leaf mounting pads.

81-87/91 'wider' 10 or 12 bolt
In 88, the C/K GMT400 style rear housings/axles got an increase in width again by 1.5".

So, if you have a truck that has one of the possible '70 model wider housings swapped in prior to your ownership, things are different vs. something that came as factory. A buddy & I learned this the hard way (after he spent $$ on new wheels).
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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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Old 01-30-2020, 01:19 PM   #19
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

these are 10" wheels....unsure of backspacing tho
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Old 02-09-2020, 02:47 AM   #20
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

Here's mine with 15x10, 325 50 15 Nitto drag tires. BS is 6.5". Wheels from Wheels Vintique. Probably could have done just 6" BS, or an even wider wheel.
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Old 02-09-2020, 04:15 AM   #21
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

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Here's mine with 15x10, 325 50 15 Nitto drag tires. BS is 6.5". Wheels from Wheels Vintique. Probably could have done just 6" BS, or an even wider wheel.
Yep..... 14" wide prob @ about 9.75"BS would be max w/a 15-16.5" wide tire.
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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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Old 02-09-2020, 02:28 PM   #22
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

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Originally Posted by goatless View Post
Here's mine with 15x10, 325 50 15 Nitto drag tires. BS is 6.5". Wheels from Wheels Vintique. Probably could have done just 6" BS, or an even wider wheel.
Man! I've always liked the look of the fleetside without a tailgate or bumper.
Nice shot. Good rake.
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Old 02-10-2020, 07:27 PM   #23
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

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Man! I've always liked the look of the fleetside without a tailgate or bumper.
Nice shot. Good rake.
LOL, thanks! No front bumper, either.
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Old 02-09-2020, 11:53 AM   #24
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

Im running these on a 66 longbed fleet. They have 5.5" backspacing. It required trimming the bed wood floor to increase the opening and widening the wheel tubs for clearance. I trimmed back the fender lips slightly.

RID-695-2173G 15x10 5.5 backspace

pics in the build thread.
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Old 02-10-2020, 07:32 PM   #25
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Re: Will 15" x 10" wide rim with 4" backspace fit with stock rear?

goatless
That is a nice ride with a good amount of rake. I am happy to hear this about the rims, that is almost exactly what i want. Thanks!!!
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