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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

Wheel / Tire combo advice

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Old Apr 14, 2014 | 05:33 PM
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Wheel / Tire combo advice

Need some help seeing if these will fit. The stock wheels have 4.5 backspacing.
Thinking about buying these wheels for the rear: http://www.summitracing.com/parts/pcw-1069-6185 (4.5 BS)
Along with these tires: http://www.summitracing.com/parts/mtt-3763r/overview/

These for the fronts: http://www.summitracing.com/parts/pc...6885/overview/ (4.0 BS)
With these tires: http://www.summitracing.com/parts/mft-50102/overview/

Here's an album of the truck they're going on: https://imgur.com/a/FZcsZ. It's stock height. Has antique plates on it, so it wont be driven much at all (>1,000 miles a year per law). Won't have much of a load in the bed either.
 
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Old Apr 14, 2014 | 05:48 PM
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8" wheels on the front of my truck was terrible on the highway real sloppy steering 7's handle good the front ends were not designed for wide tires.
 
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Old Apr 14, 2014 | 06:49 PM
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Originally Posted by centralNH
8" wheels on the front of my truck was terrible on the highway real sloppy steering 7's handle good the front ends were not designed for wide tires.
Never thought of that.

Just saw the tires for the rear are 15's. Back to the drawing board.
 
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Old Apr 14, 2014 | 07:52 PM
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235/70-15s on stock wheels in front with 275/60-15s on 15x8s in the rear look good and correct the visual anomaly of these rigs crabbing down the road due to the narrower rear track width.

Use the same principle if going with 16-inch wheels.
 
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Old Apr 15, 2014 | 08:39 AM
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Originally Posted by HIO Silver
235/70-15s on stock wheels in front with 275/60-15s on 15x8s in the rear look good and correct the visual anomaly of these rigs crabbing down the road due to the narrower rear track width.

Use the same principle if going with 16-inch wheels.
Correct. The rear axle is two inches more shallow from what I read. So a 10 inch rear with 8 or 7 front, with the same backspacing should correct it as well.

Can anyone confirm 4.5 backspacing for a 10 inch rim?
 
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Old Apr 15, 2014 | 08:57 AM
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15x8 on all four with 245/60 front 275/60 rear no sloppy freeway driving
 
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Old Apr 15, 2014 | 09:25 AM
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Originally Posted by centralNH
8" wheels on the front of my truck was terrible on the highway real sloppy steering 7's handle good the front ends were not designed for wide tires.
I have 8" wide rims up front with a lot of play in the steering and my truck is smooth as ***** on the highway.

Originally Posted by MaxPowers
Can anyone confirm 4.5 backspacing for a 10 inch rim?
I have 4 1/8" backspacing on my rear 10" rim and would not go any more. I'd be hitting the fender. I also have enough trouble as it is replacing a wheel as I have to support the frame on stands to let the axle drop. Granted, I'm lowered a bit, but still.
 
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Old Apr 16, 2014 | 08:50 AM
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Found this conversion chart, don't know it helps but thought I would post just incase.

http://www.tacomaworld.com/forum/tir...5r15-245-70r15
 
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Old Apr 16, 2014 | 08:54 AM
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Originally Posted by MaxPowers
Correct. The rear axle is two inches more shallow from what I read. So a 10 inch rear with 8 or 7 front, with the same backspacing should correct it as well.

Can anyone confirm 4.5 backspacing for a 10 inch rim?
Yes....8 on the front and 10 on the back. All with 4" back. Corrects track and it will tuck 275/60's in the rear.
 
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Old Apr 16, 2014 | 09:19 AM
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Originally Posted by xkpsanit
Yes....8 on the front and 10 on the back. All with 4" back. Corrects track and it will tuck 275/60's in the rear.
I definitely agree. 4" backspacing front and back is what you want. My tires are 235/70/15 and 275/60/15 and they both tuck in really nicely.
 
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Old Apr 16, 2014 | 12:19 PM
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Just called LMC truck to get their backspacing. The 10" rims they sell for our trucks have a 3.75 backspacing.

Guess I'm looking at 4 bs front and back. Thanks for your helps guys. I'll post them up once I get something on.
 
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Old Apr 16, 2014 | 12:22 PM
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Watch the width on the rears, I'm running 285s on the back of mine with stock backspacing and it's tight. There is room for a 12" wide tire but much more and I'd be seriously concerned about tire damage.
 
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Old Apr 16, 2014 | 12:36 PM
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Originally Posted by Ford_Six
Watch the width on the rears, I'm running 285s on the back of mine with stock backspacing and it's tight. There is room for a 12" wide tire but much more and I'd be seriously concerned about tire damage.
Ok. At the stock height I shouldn't have an issue to the outside, although I don't want them sticking out much past the fenders.

Are you running a 4" BS on yours?
 
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Old Apr 18, 2014 | 06:38 PM
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68 stock ride 10 wide 4 back with Multimile 275/60's
 
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Old Apr 18, 2014 | 07:15 PM
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'69 lowered 4" in the rear with a 10" wide rim with 4" back with 275/60/15 tires.

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