best offset and back spacing for 37s? - Ford Powerstroke Diesel Forum
Wheels, Tires, and Brakes Here's where you can post all your topics and questions about wheels, tires and brakes.
Sponsored by Discount Tire

User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 8 Old 05-02-2012, 09:33 PM Thread Starter
Compression Ignition Addict
 
Ray Bennett's Avatar
 
Join Date: Mar 2010
Location: Clear Spring , Md
Posts: 275
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
best offset and back spacing for 37s?

Im about to upgrade from 35s to 37s I know I have the minimum lift for it so I wonder what you all have found is the best offset and backspacing to clear as much as possible. Pro comp tells me -6 on 4.5 back spacing 17x9, but I have also heard anywhere from 0 to -24 I Currently have Eagle alloys with I think -24 back spacing 10 inch wheel and it caused the tire to articulate a lot and will make the 37 real close to the fender liner. Any advice is appricated.

Just bought!, 1997 F350 CCLB 5 speed manual, For now the only mod is the 4" straight pipe
2002 extended cab long bed 7.3, 3.5" lift with 37x 12.50 Terra Grapplers on 17" Pro Comps, ts 6 pos chip, 05 grille, DIY 6637 air intake, 4" MBRP exhaust with muffler delete, Built trans with PI TC tugger shift kit and suncoast 5 disk drum, custom made one peice drive shaft, Edge CTS
Ray Bennett is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 05-03-2012, 12:35 PM Thread Starter
Compression Ignition Addict
 
Ray Bennett's Avatar
 
Join Date: Mar 2010
Location: Clear Spring , Md
Posts: 275
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Anyone? Im starting to wonder if my questons I post are too stupid for respnces or too hard. Im also wondering if you think I should have the tire ballanced with weights or the bags that go inside.

Just bought!, 1997 F350 CCLB 5 speed manual, For now the only mod is the 4" straight pipe
2002 extended cab long bed 7.3, 3.5" lift with 37x 12.50 Terra Grapplers on 17" Pro Comps, ts 6 pos chip, 05 grille, DIY 6637 air intake, 4" MBRP exhaust with muffler delete, Built trans with PI TC tugger shift kit and suncoast 5 disk drum, custom made one peice drive shaft, Edge CTS
Ray Bennett is offline  
post #3 of 8 Old 05-04-2012, 06:56 AM
Powerstroke.org Rookie
 
safetyken's Avatar
 
Join Date: Sep 2011
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Sounds like you have a big decision. I would also take into consideration the tire width and tread depth. I have a 2005 F-250, same color as yours, with a 4" lift on rear and a 6" lift on front. But I placed 35x13.50.18's (or 325/65/18) on mine. I have 3/4" space when I turn my tires before I hit the front bumper. I had an 1" space before I put different tires on. I had the Pro Comp Xtreme A/T's and placed the Cooper STT's under it a few months ago. Much needed traction for places I take it. But have to be more careful not to hit holes too hard with wheels turned to not hit front bumper. If I had 12.50's, it wouldn't be such a problem. Ask your tire dealer if they believe it will clear, if you do decide to go to a larger tire. It's best to bring to a off-road dealer and get their input.
safetyken is offline  
post #4 of 8 Old 05-04-2012, 07:33 PM Thread Starter
Compression Ignition Addict
 
Ray Bennett's Avatar
 
Join Date: Mar 2010
Location: Clear Spring , Md
Posts: 275
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Thanks For the help, I think Im going to go with just -6 offset, on 9 inch wide wheels, did you use wheel weights or the bags in the tires for balancing?

Just bought!, 1997 F350 CCLB 5 speed manual, For now the only mod is the 4" straight pipe
2002 extended cab long bed 7.3, 3.5" lift with 37x 12.50 Terra Grapplers on 17" Pro Comps, ts 6 pos chip, 05 grille, DIY 6637 air intake, 4" MBRP exhaust with muffler delete, Built trans with PI TC tugger shift kit and suncoast 5 disk drum, custom made one peice drive shaft, Edge CTS
Ray Bennett is offline  
post #5 of 8 Old 05-06-2012, 03:50 PM
Powerstroke.org Rookie
 
Join Date: Aug 2011
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I have a 4.5" lift on my '11 and put 37" Toyo MT's on an 18x9 wheel, with 5.75" backspace and a +18 offset. The setup turned out well for me although I'm not sure what type of look you are going for. My tires stick out past the fenders about 1" to an 1.5", and no worry of making contact with the bumper or liner. Slight rub at full lock left, but I think that is more of an alignment issue. Hope this helps.
donbok1 is offline  
post #6 of 8 Old 05-06-2012, 07:46 PM Thread Starter
Compression Ignition Addict
 
Ray Bennett's Avatar
 
Join Date: Mar 2010
Location: Clear Spring , Md
Posts: 275
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
That does help, thanks

Just bought!, 1997 F350 CCLB 5 speed manual, For now the only mod is the 4" straight pipe
2002 extended cab long bed 7.3, 3.5" lift with 37x 12.50 Terra Grapplers on 17" Pro Comps, ts 6 pos chip, 05 grille, DIY 6637 air intake, 4" MBRP exhaust with muffler delete, Built trans with PI TC tugger shift kit and suncoast 5 disk drum, custom made one peice drive shaft, Edge CTS
Ray Bennett is offline  
post #7 of 8 Old 05-09-2012, 09:12 AM
Compression Ignition Addict
 
mechanix's Avatar
 
Join Date: May 2010
Location: Springport MI
Posts: 226
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
Quote:
Originally Posted by Ray Bennett View Post
That does help, thanks
Do you have leaf springs up front? This could also pose an issue when replacing tires. I am running a rim with 35" mud countrys and they rub the leafs with a +18 offset at full wheel lock. I am going to switch to a -12 rim and was wondering if a 37" tire will rub myself.

Eric

03 F350 Super Duty
ARP head studs
Warren 155/30% injectors
Barder Stage 2 turbo
SCT Tuner
EGR delete
35x12.50x20 Nitto Trail Grapplers
03' No start when hot, ok when cold
mechanix is offline  
post #8 of 8 Old 05-09-2012, 01:11 PM Thread Starter
Compression Ignition Addict
 
Ray Bennett's Avatar
 
Join Date: Mar 2010
Location: Clear Spring , Md
Posts: 275
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by mechanix View Post
Do you have leaf springs up front? This could also pose an issue when replacing tires. I am running a rim with 35" mud countrys and they rub the leafs with a +18 offset at full wheel lock. I am going to switch to a -12 rim and was wondering if a 37" tire will rub myself.
This I can help ya with, I do have the front leafs, and you are running the wrong wheels, That kind of offset is for the 05s and up, on our trucks we need 0 or negative offset. I am currently running -16 offset with 35s and dont get near the leaf springs, The only problem with moving the tires out wider is the further out they go the closer they get to hitting the fender well near the door because they articulate more when you move them out. I think I will go with either 0 offset or maybe -6 i need less articulation with the taller tires. But back to your question, as long as you are between 0 and somthing negative you will not rub with 35s

Just bought!, 1997 F350 CCLB 5 speed manual, For now the only mod is the 4" straight pipe
2002 extended cab long bed 7.3, 3.5" lift with 37x 12.50 Terra Grapplers on 17" Pro Comps, ts 6 pos chip, 05 grille, DIY 6637 air intake, 4" MBRP exhaust with muffler delete, Built trans with PI TC tugger shift kit and suncoast 5 disk drum, custom made one peice drive shaft, Edge CTS
Ray Bennett is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome