Upgrading to 33x12.5. How much will my tires stick out? - JeepForum.com
 
LinkBack Thread Tools
post #1 of 12 Old 02-08-2011, 08:28 AM Thread Starter
KMacDiddy
Registered User
2005 TJ Wrangler 
 
Join Date: Oct 2010
Posts: 28
Upgrading to 33x12.5. How much will my tires stick out?

I've done a lot of research and I'm just about ready to pull the trigger on my first upgrade:

- 3" Zone lift
- adjustable track bar
- Cragar D-windows 15x8.5 (black); 4" backspacing
- 33x12.5 Mickey MTZs

I've got an '05 Rubicon with 16x8 Moabs (5" BS), my question is: how much will the new wheels/tires stick out from the stock (rubi) fender flares?

My thinking is that the new setup will cause my tires to stick out a 0.5" more than the current setup? Is that right? Anybody have a pic of a Rubicon with this setup?

BTW, I'm a noobie here... so go easy on me. I tried the search function, but just didn't see any direct matches for my question.

KMacDiddy is offline  
Sponsored Links
Advertisement
 
post #2 of 12 Old 02-08-2011, 08:31 AM
Jerry Bransford
Administrator
 
Jerry Bransford's Avatar
2004 TJ Wrangler 
 
Join Date: Jan 2003
Location: Escondido, California
Posts: 71,571
We can't tell you how much further they will stick out without knowing what size tire you are running now. I can tell you this, a 12.5" wide tire is too wide for wheels with 5" of backspacing (the inside sidewall will rub on the suspension) so to run that wide of a tire, you will have to go with an aftermarket wheel with 4" or less BS. 4.5" BS will work if you install a pair of washers under the steering stop bolts. Or install wheel spacers.

When you have a choice, buy American made.
Jerry Bransford is offline  
post #3 of 12 Old 02-08-2011, 08:47 AM
jdub36
Registered User
1997 TJ Wrangler 
 
Join Date: Jan 2010
Location: Killeen
Posts: 408
I am running 35x12.50's on wheels with 3.75in backspacing and i still had a little rubbing on the lower control arm at full lock. Three washers on each steering stop did the trick. I like the look of the tires sticking out wide but it sucks when you hit mud or even a puddle on the street with them sticking out that far.

jw
jdub36 is offline  
 
post #4 of 12 Old 02-08-2011, 08:54 AM
TheBoogieman
Distubed Jeepaholic
 
TheBoogieman's Avatar
2003 TJ Wrangler 
 
Join Date: Aug 2006
Location: charlottesville
Posts: 38,592
Quote:
Originally Posted by KMacDiddy View Post
I've done a lot of research and I'm just about ready to pull the trigger on my first upgrade:

- 3" Zone lift
- adjustable track bar
- Cragar D-windows 15x8.5 (black); 4" backspacing
- 33x12.5 Mickey MTZs

I've got an '05 Rubicon with 16x8 Moabs (5" BS), my question is: how much will the new wheels/tires stick out from the stock (rubi) fender flares?
Around 2" with the Rubi stock flares.Mine stick out 3" with that setup and stock TJ flares.Rubi flares are an inch wider.Good choice of lift.I recently installed the Zone 4.25" combo lift (with 35's)and couldn't be happier with the ride quality.

TheBoogieman is online now  
post #5 of 12 Old 02-08-2011, 09:00 AM
RowJ
Registered User
 
RowJ's Avatar
1998 TJ Wrangler 
 
Join Date: Jun 2010
Location: Texas/OK Border
Posts: 2,026
Quote:
Originally Posted by KMacDiddy View Post
...My thinking is that the new setup will cause my tires to stick out a 0.5" more than the current setup? Is that right?
Your Cragers will add 1" width.
Add in 1/2 the difference in width of present vs MYZ tires and measure ... adding the total to your present width.

Clear?

RJ
RowJ is offline  
post #6 of 12 Old 02-08-2011, 01:45 PM Thread Starter
KMacDiddy
Registered User
2005 TJ Wrangler 
 
Join Date: Oct 2010
Posts: 28
Quote:
Originally Posted by Jerry Bransford View Post
We can't tell you how much further they will stick out without knowing what size tire you are running now. I can tell you this, a 12.5" wide tire is too wide for wheels with 5" of backspacing (the inside sidewall will rub on the suspension) so to run that wide of a tire, you will have to go with an aftermarket wheel with 4" or less BS. 4.5" BS will work if you install a pair of washers under the steering stop bolts. Or install wheel spacers.
I've got 245/75R16s on there now.

RowJ, thanks, I guess I had the backspacing impact backwards (i.e. I subtracted an inch). 1.45" (1/2 of width diff in tires) + 1" backspacing = 2.5" further than current.
KMacDiddy is offline  
post #7 of 12 Old 02-08-2011, 01:53 PM
RowJ
Registered User
 
RowJ's Avatar
1998 TJ Wrangler 
 
Join Date: Jun 2010
Location: Texas/OK Border
Posts: 2,026
Good Luck!
Back Spacing is depth measured from the back side of the tire.
Hence, the name....I guess!

That's going move your (new tire) inside sidewalls .45" closer to the suspension than now!
You might measure to be sure you have enough room on both sides... with tires at lower pressure.
Should be ok based on what Jerry said above (I don't know the 05's).

RJ
RowJ is offline  
post #8 of 12 Old 02-08-2011, 02:12 PM
RogueSpear2023
Registered User
2003 TJ Wrangler 
 
Join Date: Jun 2008
Location: Jamestown, ND
Posts: 6,949
I had the same set-up on my Rubicon and the tire stuck 2.25" beyond the flares, I now have 6" flares the tread is covered but the side wall flex still sticks out a a little bit. This will vary a little bit depending on the tire, my tires are 12" wide some tires run narrow, and some run wide, just because the say 12.5" doesn't mean they will be 12.5".

Max

2003 Jeep Wrangler Rubicon
4.0L, 42RLE, Dual Tops, Full Doors, JKS Front Disconnects, Cragar Soft 8 Black Wheels, 33x12.5x15 Goodyear Duratracs, .75" Front Coil Spacers, Bushwacker 6" Flat Fender Flares, Skid Row Steering Box Skid, LubeLockers, Rubicon Locker Mod, OBA, Cobra 19 Ultra III CB, 3' Firestik, Rough Country 2.2 Steering Stabilizer, RC 1.25" BL, RC 1" MML, RC Grab Handles, Fog Lamp Bent Pin Mod, 4" Apline S Series Speakers, Kenwood Excelon 6.5" Speakers, 6.5" JL Audio 6W3V3 Subwoofer (in center console) w/MTX Thunder 202 amp, IPF H4 Headlight Housing, Sliverstar H4 bulbs.




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


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


"Buying a jeep and not taking it off road, is like buying a dragster and never taking it to the track"
RogueSpear2023 is offline  
post #9 of 12 Old 02-08-2011, 02:40 PM
SpoiledRotten
Registered User
 
SpoiledRotten's Avatar
2000 TJ Wrangler 
 
Join Date: Nov 2006
Location: Mississippi
Posts: 1,985
I have the 33 12.5 15 on mine with no rubbing. I do have aftermarket wheels though.

2009-03-16-vacationing-central-florida-041.jpg

Christian Jeepers _ Member #2
United Four Wheel Drive Association _ Member
National Rifle Association _ Member
SpoiledRotten is offline  
post #10 of 12 Old 02-08-2011, 02:59 PM Thread Starter
KMacDiddy
Registered User
2005 TJ Wrangler 
 
Join Date: Oct 2010
Posts: 28
Quote:
Originally Posted by SpoiledRotten View Post
I have the 33 12.5 15 on mine with no rubbing. I do have aftermarket wheels though.

Attachment 189289
Looking good! Do you know the backspacing of your wheels?
KMacDiddy is offline  
post #11 of 12 Old 02-09-2011, 07:38 AM
deerassassin22
Registered User
 
deerassassin22's Avatar
2011 JK Wrangler 
 
Join Date: Apr 2010
Location: Phenix City, AL
Posts: 657
I run 33x12.50x 15s with stock TJ flares on Rims with 3.25BS stick out about 3inches can send pics if you want just let me know.

Cobra 29 CB, 4ft Firestick Antenna, Skid Row Evap Skid, Rockhard Engine Skid, Rockhard Tranny Skid, Mesh Grill Mod, Mastercraft Grab Handles, Front and Rear ARB Diff Covers, Smittybilt Rock Rails, KC 130Watt Long Range Lights, Delta Light Mounts, TorqFlo tranny cooler, Hood Louvers, Drake Hood Pins, AEV Snorkel, Smittybilt 10,000 Winch, Rockhard Shorty Bumper with KC 100watt Slim Light Driving Lights, JKS ACOS Front System, Breather Extensions.
deerassassin22 is offline  
post #12 of 12 Old 02-09-2011, 10:04 AM
SpoiledRotten
Registered User
 
SpoiledRotten's Avatar
2000 TJ Wrangler 
 
Join Date: Nov 2006
Location: Mississippi
Posts: 1,985
Quote:
Originally Posted by KMacDiddy View Post
Looking good! Do you know the backspacing of your wheels?

I think they are 3.75" B/S.


http://www.summitracing.com/parts/ARE-6475865/

Christian Jeepers _ Member #2
United Four Wheel Drive Association _ Member
National Rifle Association _ Member
SpoiledRotten is offline  
Reply

Tags
15x8 , 3" lift , 33x12.5 , backspacing , rubicon

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Upgrading Tires pyrow07 TJ Wrangler Technical Forum 0 09-08-2009 06:42 AM
How far will 33x12.50x15 stick on a 15x8 4"bs JEEP-DADDY TJ Wrangler Technical Forum 11 06-01-2009 11:01 AM
Upgrading D44 and tires separately? CapecodTJ TJ Wrangler Technical Forum 2 01-11-2009 04:42 PM
33x12.5 15's with a four banger stick. demoguru YJ Wrangler Technical Forum 10 11-11-2006 05:38 AM

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 Off
Pingbacks are On
Refbacks are On

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