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Rim backspacing question #919479 12/08/08 05:16 AM
Joined: Aug 2007
Posts: 147
the_other_guy Offline OP
Wheeler
How much backspacing do I need to correctly fit 33"x12.5"s on a yj?

also, just to clarify, I know that backspacing is like the offset, but what exactly does it measure? what is further out from the vehicle, a higher, or lower number?

I have never had to worry about this before, because last time i lifted a jeep, i already had rims and tires, so pardon me if it seems i am asking stupid questions. <img src="/forums/images/graemlins/kewl.gif" alt="" />


Your road to glory will be rocky, but fulfilling.
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94 YJ. no lift...YET
From the Off-Road World
Re: Rim backspacing question [Re: the_other_guy] #919480 12/08/08 05:51 AM
Joined: Oct 2003
Posts: 7,768
BigJim Offline
Web Wheeler
The offset of a wheel is the distance from the mounting surface of the wheel to the true centerline of the rim. A positive offset means the mounting surface of the wheel is positioned in front of the true centerline of the rim / tire assembly. This in effect brings the tire in to the fender well more. Conversely, a negative offset means the mounting surface of the wheel is behind the true centerline of the rim / tire assembly. This will cause the tire to stick out away from the vehicle.

Backspasing on the other hand is the distance from the mounting pad to the INSIDE of the rim..

Personally I do NOT know what you would need.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />


professional bovine relocation specialist
Re: Rim backspacing question [Re: BigJim] #919481 12/08/08 07:04 AM
Joined: Dec 2007
Posts: 725
TayJ Offline
Rock Warrior
It really depends on what look you are after, if your rig is stock or modifided and how much...etc. Just about any 15" rim made for a jeep will be fine.


Jeep
Jus' sayin'
Re: Rim backspacing question [Re: BigJim] #919482 12/08/08 07:27 PM
Joined: Aug 2007
Posts: 147
the_other_guy Offline OP
Wheeler
thanks Jim. that helped.

as for what look I want, my jeep isnt modified much. I just want rims to fit 33" tires with enough clearance, so my turning radius isn't affected.


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94 YJ. no lift...YET
Re: Rim backspacing question [Re: the_other_guy] #919483 12/08/08 08:06 PM
Joined: Feb 2000
Posts: 6,247
4x4Wire Offline
Trail Leader
***
Normal backspacing is 4.5 inches and you should be fine for 33's.

However, if you are considering modifications such as spring over and its accompanying steering mods, go for a 3.5 inch backspacing.


John Stewart
Editor - 4x4Wire.com
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Re: Rim backspacing question [Re: 4x4Wire] #919484 12/08/08 10:50 PM
Joined: Aug 2007
Posts: 147
the_other_guy Offline OP
Wheeler
thanks KF6ZPL. thats the answer I was looking for.
spring over is a VERY possible future mod for me, so Ill probably go for 3.5"


Your road to glory will be rocky, but fulfilling.
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94 YJ. no lift...YET
Re: Rim backspacing question [Re: the_other_guy] #919485 12/08/08 11:12 PM
Joined: Feb 2000
Posts: 6,247
4x4Wire Offline
Trail Leader
***
If you are considering a spring-over, check out my article at:

http://www.4x4wire.com/index.php?op...mp;catid=41:jeepyj-cat&Itemid=54


John Stewart
Editor - 4x4Wire.com
Editor - 4x4Voice
Editor - MUIRNet-News
President - BlueRibbon Coalition
Re: Rim backspacing question [Re: 4x4Wire] #919486 12/09/08 04:29 PM
Joined: Oct 2006
Posts: 2,079
Brown81CJ5 Offline
Body Damage is Cool
Great write up John. <img src="/forums/images/graemlins/kewl.gif" alt="" />

Only problem is what is up with the right hand margin? It covers up the last few letters on the right side of the article.


Gun it and run it!
1981 CJ5,258,T-176,D300,AMC 20,Dana 30,Trxus M/T 31x10.50, Rancho 5000's, GroundPounderFab front bumper, polyethylene gas tank, aluminum dash, AutoMeter gauges

What this country needs is unemployed politicians.
Re: Rim backspacing question [Re: Brown81CJ5] #919487 12/09/08 05:55 PM
Joined: Feb 2000
Posts: 6,247
4x4Wire Offline
Trail Leader
***
What browser are you using?

We have noted a few display quirks with IE 6 and older....

IE 7, FireFox, and Safari on a variety of OSs provide correct display.


John Stewart
Editor - 4x4Wire.com
Editor - 4x4Voice
Editor - MUIRNet-News
President - BlueRibbon Coalition
Re: Rim backspacing question [Re: 4x4Wire] #919488 12/10/08 05:12 AM
Joined: Aug 2007
Posts: 147
the_other_guy Offline OP
Wheeler
Works fine for me. Im usin firefox.

Nice write up. Thats about how i plan on doing it, only I will probably make my own traction bar.

all in due time tho.


Your road to glory will be rocky, but fulfilling.
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94 YJ. no lift...YET
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