37" help - JKowners.com : Jeep Wrangler JK Forum
 
LinkBack Thread Tools Display Modes
post #1 of 9 Old 03-14-2014, 10:00 AM Thread Starter
Granite Guru
 
Join Date: May 2009
Location: Rochester, NY
Age: 50
Posts: 437
Feedback: 0 reviews
37" help

I searched for this and didn't find the specific question I have so...


I'm looking to eventually run 37"x12.5"x17" tires on my 2011 JKUR.
I'm looking at either XD Addict or ProComp 7005 wheels.

Can I run that tire size with a 4.5" or 4.75" backspace ok, or will I need to go with a 3.5" BS like the 13"+ tires need? (4.5"+1" spacer, etc.)

If it helps, I will be running a Rock Krawler 3.5" Flex system and flat fenders.

Thank you for your assistance.
Grimscale is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 03-14-2014, 03:25 PM
JKO Addict!
 
thedirtman's Avatar
 
Join Date: Aug 2010
Location: southwest reno, nv
Age: 51
Posts: 4,273
Feedback: 0 reviews

You don't want to run 1" spacers you need to go to a 1.5" adapter if you are going to run off road with a 4.5"+bs wheel.Look to net out to around 3". Your lift and fenders really don't have anything to do with it unless you are bump stopped so you don't have any up travel.

Some build info here:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


[COLOR="Red"]New to jeeps, check this link
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
thedirtman is offline  
post #3 of 9 Old 03-17-2014, 01:14 PM
Rock God
 
Join Date: Jan 2014
Posts: 1,519
Feedback: 0 reviews

Quote:
Originally Posted by Grimscale View Post
I searched for this and didn't find the specific question I have so...


I'm looking to eventually run 37"x12.5"x17" tires on my 2011 JKUR.
I'm looking at either XD Addict or ProComp 7005 wheels.

Can I run that tire size with a 4.5" or 4.75" backspace ok, or will I need to go with a 3.5" BS like the 13"+ tires need? (4.5"+1" spacer, etc.)

If it helps, I will be running a Rock Krawler 3.5" Flex system and flat fenders.

Thank you for your assistance.
If those 37x12.50s run true to size (37x12.50 17 BFG KM2s are 35.5" tires) and you want to keep your full steering range you will need a net BS of about 3-3.25" to prevent frame rubbing at full turn and full stuff. 1.5" wheel spacers plus 4.5" BS wheels would work well.
Terminator2 is offline  
Sponsored Links
Advertisement
 
post #4 of 9 Old 03-18-2014, 09:43 AM
JKO Addict!
 
White13JKUR's Avatar
 
Join Date: Oct 2013
Location: Danville, CA
Posts: 2,988
Feedback: 0 reviews

I'm running 37" MTRs on stock 2013 rubi wheels with teraflex adapters so that's 6.25" on the factory wheel less the 1.25" of the teraflex adapters or 5" of back spacing. I am actually thinking about widening the track a bit more and going to either a 1.5" wheel spacer (probably the rugged ridge) or to procomp 7069s @ 4.5"

Running aev 4.5" lift and no rubbing durring daily driving or moderate playing at the local 4x4 park. No hard wheeling yet but similar setup was fine on hard core trails (3.5" lift with 35" tires).

Stock rock sliders hit at the extreme with 35s and are now off.

Have not had to adjust the steering stops at all since it left the factory.

Already have a January 13 build so have the trimmed punch seam from the factory.
White13JKUR is offline  
post #5 of 9 Old 03-20-2014, 06:52 AM
Rock God
 
Join Date: Jan 2014
Posts: 1,519
Feedback: 0 reviews

Quote:
Originally Posted by White13JKUR View Post
I'm running 37" MTRs on stock 2013 rubi wheels with teraflex adapters so that's 6.25" on the factory wheel less the 1.25" of the teraflex adapters or 5" of back spacing. I am actually thinking about widening the track a bit more and going to either a 1.5" wheel spacer (probably the rugged ridge) or to procomp 7069s @ 4.5"

Running aev 4.5" lift and no rubbing durring daily driving or moderate playing at the local 4x4 park. No hard wheeling yet but similar setup was fine on hard core trails (3.5" lift with 35" tires).

Stock rock sliders hit at the extreme with 35s and are now off.

Have not had to adjust the steering stops at all since it left the factory.

Already have a January 13 build so have the trimmed punch seam from the factory.
With a 5" net BS and as much tire bubble as a 12.50 width tire has on a 7.5" wide wheel this seems crazy to me. I see people with 37s and a 4" BS rub paint off the frames when wheeling
Terminator2 is offline  
post #6 of 9 Old 03-20-2014, 09:09 AM
Rock God
 
jkx0778's Avatar
 
Join Date: Jan 2010
Age: 41
Posts: 879
Feedback: 3 reviews

Quote:
Originally Posted by White13JKUR View Post
I'm running 37" MTRs on stock 2013 rubi wheels with teraflex adapters so that's 6.25" on the factory wheel less the 1.25" of the teraflex adapters or 5" of back spacing. I am actually thinking about widening the track a bit more and going to either a 1.5" wheel spacer (probably the rugged ridge) or to procomp 7069s @ 4.5"

Running aev 4.5" lift and no rubbing durring daily driving or moderate playing at the local 4x4 park. No hard wheeling yet but similar setup was fine on hard core trails (3.5" lift with 35" tires).

Stock rock sliders hit at the extreme with 35s and are now off.

Have not had to adjust the steering stops at all since it left the factory.

Already have a January 13 build so have the trimmed punch seam from the factory.
Last I checked the stock wheels had 5.5" backspacing. I'm going off 2007-2010 stock wheels. Haven't seen / measured 2013 wheels. So with 5.5" backspacing - 1.25" spacers = 4.25" backspacing.

Running 37x12.50r17 BFG KM1's (yes old school KM1's) on 17x8 steel wheels with 4" backspacing, I only barely rubbed the front of the anti-sway bar at full stuff and full turn. I run the teraflex QD that relocate the end links to the front body mount when stored/disconnected. I have not adjusted the stock steering stops.

________________


08 Unlimited: Lift, Wheels, Tires, Winch ... and an ever shrinking bank account
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
jkx0778 is offline  
post #7 of 9 Old 03-21-2014, 04:34 PM
51%
Wheeler
 
Join Date: Dec 2013
Posts: 16
Feedback: 0 reviews

I am running that tire on Pintlers. No spacer, no rubbing and I have not changed steering stops either. Suggest you look up the specs on that wheel.

And no, it's not a mall crawler either.

14 JKU 4-1/2 AEV Dualsport RS, 37" KM2 on Pintlers, PR44, 4.88, ARBs .... under construction
51% is offline  
post #8 of 9 Old 03-21-2014, 07:11 PM
V8 dreams
 
jvandy50's Avatar
 
Join Date: Sep 2010
Location: jonesboro, ar
Posts: 3,535
Feedback: 0 reviews

that size MTR/k and 3.5 BS wheels and i still hit the frame some. it is what it is


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
2010 Silver JKU
jvandy50 is offline  
post #9 of 9 Old 03-21-2014, 08:47 PM
Granite Guru
 
tehiv's Avatar
 
Join Date: Jan 2009
Location: McKinney, TX
Posts: 480
Garage
Feedback: 0 reviews

Grimscale, I'm on RK 3.5", Procomp 7005s, MTR/K 37x12.5x17 and Xenon flat flares... pretty much exactly what you're looking at.

I rubbed all the paint off the frame on the driver's side. Added 1.5" Spidertrax and it doesn't hit any more.

tehiv
'14 Copperhead JKUR
'14 White WK2 Overland

formerly: 98 TJ | 97 XJ | 05 TJ | 01 WJ | 07 JKU
tehiv is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JKowners.com : Jeep Wrangler JK 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










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