37's/38's how much backspacing do I need to stay off my leaves? - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 10-06-2013, 08:04 PM Thread Starter
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37's/38's how much backspacing do I need to stay off my leaves?

I'm currently running X+ codes up front with plans in the next few weeks of doing Bushwacker Cut-Out's(deer screwed up my fender and she needs some other body work so she's in the shop..)
I already have a custom full replacement front bumper with lots of tire clearance.

Original plans were a 17"x9" w. 3.5-4"bs wheel with 37x12.5 Goodyear Wrangler MT/R's w. Kevelar


Of all the countless threads I've read there are three general responses:
1) "They rub a little on the leaves at full lock"
2) "I had to do some trimming but they work great now"
3) "There's no way that setup will fit"

My truck is my daily driver, but she's not a street queen..
I'm looking at larger tires to give me axle clearance in the mud and snow.
Being a CCLB I can't sacrifice any more turning radius, and hope there never be the case that I have to break out the tire chains therefore I don't want rubbing of any sort.

So my questions are:
What setup's are you guys running? All wheel sizes and tire widths..
How much space do you have between the springs and tire at full lock?

Pics would be great if you have them.
Thanks guys.
The1Laf


2000 F-350 Lariat CCLB w. 335,000+ Mi
Tymar intake, Straight 4", 6.0 Intercooler, IDP Competition Fuel System, AC's, SB SD Clutch, ZF6 Short Shift Kit
Gearhead Tunes, Swamps IDM, Snow Performance Water/Meth, Isspro Performax Gauges & 08 Black Leather Seats
05 Harley's, Smoked tails, Weld Racing Sidewinder Wheels

Fried Piston, Re-building engine
330 RWHP Fuel Only - 363 RWHP w. Meth
Broke College kid... Eating Ramon to save for truck parts..

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post #2 of 7 Old 10-08-2013, 07:40 PM Thread Starter
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Nobody's running big tires on their 7.3L? I've seen quite a few here on the .Org, they just must not be checking this section...

Anybody have insight?


2000 F-350 Lariat CCLB w. 335,000+ Mi
Tymar intake, Straight 4", 6.0 Intercooler, IDP Competition Fuel System, AC's, SB SD Clutch, ZF6 Short Shift Kit
Gearhead Tunes, Swamps IDM, Snow Performance Water/Meth, Isspro Performax Gauges & 08 Black Leather Seats
05 Harley's, Smoked tails, Weld Racing Sidewinder Wheels

Fried Piston, Re-building engine
330 RWHP Fuel Only - 363 RWHP w. Meth
Broke College kid... Eating Ramon to save for truck parts..

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post #3 of 7 Old 10-09-2013, 07:38 PM
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I had 38x14.5-15.5s on my last f250, i had 16x12 with 4.5" back spacing and -50mm offset. Never once rubbed my leaf springs.




2003 F250 Lariat 7.3 160k
3" leveling kit, 22x14 Moto Metal 962, 33x12.50 Toyo MT, 2" wheel spacers
Harley heads, 08+ mirrors, 08+ taillights, LED switchbacks, HIDs, 20" LED light bar
DP Tuner, 4" turbo back (dumped before rear passenger tire), 6637 intake, Glowshift gauges

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post #4 of 7 Old 10-09-2013, 07:52 PM Thread Starter
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Thanks a bunch! Your old truck was beautiful, too bad she wasn't a diesel.

Did you notice any difficulty driving because your tires don't match the ruts left by the Semi's?

Another note, how did you like your Light bar? I'm looking at adding 1-2 with my new bumper..


2000 F-350 Lariat CCLB w. 335,000+ Mi
Tymar intake, Straight 4", 6.0 Intercooler, IDP Competition Fuel System, AC's, SB SD Clutch, ZF6 Short Shift Kit
Gearhead Tunes, Swamps IDM, Snow Performance Water/Meth, Isspro Performax Gauges & 08 Black Leather Seats
05 Harley's, Smoked tails, Weld Racing Sidewinder Wheels

Fried Piston, Re-building engine
330 RWHP Fuel Only - 363 RWHP w. Meth
Broke College kid... Eating Ramon to save for truck parts..

the1laf is offline  
post #5 of 7 Old 10-09-2013, 09:16 PM
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As far as the ruts no, I felt way more comfortable in that truck than my new one.

And you're telling me about the not being diesel. That thing was perfect every dime I made in high school went to that truck. I actually still have it at home it's waiting to get bought. I just couldn't drive it living 3 hours away from home.

The light bar is absolutely amazing. I'll get you some more pics of it whenever I get back on my computer tomorrow.

One last beauty shot for now though, before the light bar

2003 F250 Lariat 7.3 160k
3" leveling kit, 22x14 Moto Metal 962, 33x12.50 Toyo MT, 2" wheel spacers
Harley heads, 08+ mirrors, 08+ taillights, LED switchbacks, HIDs, 20" LED light bar
DP Tuner, 4" turbo back (dumped before rear passenger tire), 6637 intake, Glowshift gauges

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post #6 of 7 Old 10-11-2013, 07:41 PM Thread Starter
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BTW Nice color Here's mine a couple years ago..


I see you were still running the stock stabilizer?
Please post more pics


2000 F-350 Lariat CCLB w. 335,000+ Mi
Tymar intake, Straight 4", 6.0 Intercooler, IDP Competition Fuel System, AC's, SB SD Clutch, ZF6 Short Shift Kit
Gearhead Tunes, Swamps IDM, Snow Performance Water/Meth, Isspro Performax Gauges & 08 Black Leather Seats
05 Harley's, Smoked tails, Weld Racing Sidewinder Wheels

Fried Piston, Re-building engine
330 RWHP Fuel Only - 363 RWHP w. Meth
Broke College kid... Eating Ramon to save for truck parts..

the1laf is offline  
post #7 of 7 Old 10-12-2013, 11:58 AM
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2003 F250 Lariat 7.3 160k
3" leveling kit, 22x14 Moto Metal 962, 33x12.50 Toyo MT, 2" wheel spacers
Harley heads, 08+ mirrors, 08+ taillights, LED switchbacks, HIDs, 20" LED light bar
DP Tuner, 4" turbo back (dumped before rear passenger tire), 6637 intake, Glowshift gauges

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