Author Topic: backspace / bolt pattern / flare fit  (Read 2282 times)

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alandchris

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backspace / bolt pattern / flare fit
« on: March 19, 2007, 11:42:16 AM »
Have 95 Wrangler
going to put a 3.5 inch fabtech lift in at some point

wanted to put MT 33" baja claws / MT classic rims... but
came across a deal on 32" procomp AT's on 15 x 8 american racing baja rims
told they are 5 x 4.25 Bolt pattern with 3.75 backspace - off a newer TJ

is the bolt pattern ok ( I think so, need confirmation) and the backspace ok in your opinion
Would I need new flares (6 or 7 inch ?) or keep stock to basically cover the tire

thx for any advice @!


Offline oldjeep

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Re: backspace / bolt pattern / flare fit
« Reply #1 on: March 19, 2007, 11:58:54 AM »
3.75" is a pretty normal backspacing for a YJ.  Assuming 12.5" tires, they'll stick out of the flares around 3 inches.  These are 35 x 12.5 tires on 15x8 3.75" backspace AR767 rims.  I do have TJ flares, but they aren't really any wider than YJ flares - just have a larger wheel opening.

Chuck P
The clowns'? Oh, yeah, the clowns. We fight them too — entire armies, spilling out of Volkswagons. We do our best to fight them off, but they keep sending 'em in!
94 YJ - gone
98 ZJ - sons truck
97 TJ - daughters project

www.oldjeep.com

Offline oldjeep

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Re: backspace / bolt pattern / flare fit
« Reply #2 on: March 19, 2007, 12:00:41 PM »
double post
Chuck P
The clowns'? Oh, yeah, the clowns. We fight them too — entire armies, spilling out of Volkswagons. We do our best to fight them off, but they keep sending 'em in!
94 YJ - gone
98 ZJ - sons truck
97 TJ - daughters project

www.oldjeep.com

alandchris

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Re: backspace / bolt pattern / flare fit
« Reply #3 on: March 19, 2007, 12:50:38 PM »
thx Oldjeep


Offline Jeffy

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Re: backspace / bolt pattern / flare fit
« Reply #4 on: March 19, 2007, 02:19:29 PM »
Have 95 Wrangler
going to put a 3.5 inch fabtech lift in at some point

wanted to put MT 33" baja claws / MT classic rims... but
came across a deal on 32" procomp AT's on 15 x 8 american racing baja rims
told they are 5 x 4.25 Bolt pattern with 3.75 backspace - off a newer TJ

is the bolt pattern ok ( I think so, need confirmation) and the backspace ok in your opinion
Would I need new flares (6 or 7 inch ?) or keep stock to basically cover the tire

thx for any advice @!



Well, someone has their measurements screwed up.5 x 4.25" isn't the TJ bolt pattern.  TJ's as well as YJ's and XJ's use 5 x 4.5" bolt pattern.  If those wheels are in fact 5 x 4.25" they will not work.

As for the backspacing, I wouldn't use them.  It's too much and you're tires are going to be forced outward.  They will stick out 3-4" from a stock flare.  If you use Rubicon/Sahara TJ flares then it will be 2".  Really, though, you want wheels that are in the 4-4.5" range.  Stock wheels are 5.5" usually.  TJ'ers usually use 4.25-4.75" range with 12.5" wide tires.  Most wheels come in 3.75" because that's what was popular size with many trucks in the 70's and 80's.  If you have fender laws to deal with it's best to keep the tires under the flares.  Some states have limits on flares, too so beware.

I currently run 3.75" BS on a 15x8" wheel.  To keep the tires completely covered, I'm running 7" wide warn flares.  When I swap axles, I'm probably going to go with 4.5" or more BS so I can go back to 3.75-4.75" wide flares.  Wider flares really change the look of the Jeep and make it look lower then it actually is.
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"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."

Offline oldjeep

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Re: backspace / bolt pattern / flare fit
« Reply #5 on: March 19, 2007, 02:41:39 PM »
If you go to a 4.5" BS with a 12.5" wide tire arn't you going to have some problems with the tires hitting the springs on full lock?
Chuck P
The clowns'? Oh, yeah, the clowns. We fight them too — entire armies, spilling out of Volkswagons. We do our best to fight them off, but they keep sending 'em in!
94 YJ - gone
98 ZJ - sons truck
97 TJ - daughters project

www.oldjeep.com

Offline Jeffy

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Re: backspace / bolt pattern / flare fit
« Reply #6 on: March 19, 2007, 05:27:33 PM »
If you go to a 4.5" BS with a 12.5" wide tire arn't you going to have some problems with the tires hitting the springs on full lock?

Not if you adjust the bumpstops.
Youtube Channel: https://www.youtube.com/channel/UCZNlr60GXH5OlKIFrT7P6mg
My Jeep: http://4bangerjp.com/forums/index.php?topic=2783.0
"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."

Offline oldjeep

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Re: backspace / bolt pattern / flare fit
« Reply #7 on: March 19, 2007, 06:48:02 PM »
If you go to a 4.5" BS with a 12.5" wide tire arn't you going to have some problems with the tires hitting the springs on full lock?

Not if you adjust the bumpstops.

True enough, if you are willing to give up the turning radius.
Chuck P
The clowns'? Oh, yeah, the clowns. We fight them too — entire armies, spilling out of Volkswagons. We do our best to fight them off, but they keep sending 'em in!
94 YJ - gone
98 ZJ - sons truck
97 TJ - daughters project

www.oldjeep.com

Offline Jeffy

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Re: backspace / bolt pattern / flare fit
« Reply #8 on: March 23, 2007, 05:34:13 PM »
True enough, if you are willing to give up the turning radius.

That's the only downside but not that many people would really notice it.  The Jeep has a really tight radius to begin with.  Offroad, many will have a locker and that will cause understeer that would mask any different in the turning radius.  I still hear the *blub*blub*blub* as I lock the wheel and the suspension compresses a bit.  :lol:
Youtube Channel: https://www.youtube.com/channel/UCZNlr60GXH5OlKIFrT7P6mg
My Jeep: http://4bangerjp.com/forums/index.php?topic=2783.0
"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."