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How Wide should we go?


 
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hhassey
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Joined: 22 Apr 2005
Location: Toluca Mexico

PostPosted: Tue Sep 06, 2005 6:35 am    Post subject: How Wide should we go? Reply with quote

The Question is, if we go tall a certain amount, how wide should we go in order to have the same stability?

i'm checking the geometry of this problem , and soon will post a document with the geometrical answer, in the meantime please enrich this post.

Any Experiences?
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WhatWasIThinkin
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Joined: 02 Jan 2004
Location: Epping New Hampsha

PostPosted: Tue Sep 06, 2005 7:07 am    Post subject: Reply with quote

The simple answer.

It depends on the state laws and what they allow. Go as wide as possible, well to a point. Most states dont allow the tires to extend beyond the fenders or flares on any vehicle. Some allow some and some dont pay any attention as long as your not driving stupid. No one looks at mine and Im out probably 2.5" beyond my OEM flares with my 12.5x33's.

The complicated mathematical answer? Gawd damn if I know. I was terrible at math rofl
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hhassey
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Joined: 22 Apr 2005
Location: Toluca Mexico

PostPosted: Tue Sep 06, 2005 9:43 am    Post subject: Reply with quote

It is not that simple, the wider you go, the more you stress the bearings.
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WhatWasIThinkin
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Joined: 02 Jan 2004
Location: Epping New Hampsha

PostPosted: Wed Sep 07, 2005 3:14 am    Post subject: Reply with quote

hhassey wrote:
It is not that simple, the wider you go, the more you stress the bearings.



thats not what you asked there professor. Umm didnt think I needed to break out the slide rule and calculator on this one. Sorry I didnt qualify this one at your level Rolling Eyes
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Code3TJ
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Joined: 01 Jan 2004
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PostPosted: Wed Sep 07, 2005 9:25 am    Post subject: Reply with quote

So what do you want to know about? Stability or bearings?
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ThePhantum
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Joined: 23 Jan 2004
Location: I knew it...I'm surrounded by Assholes!

PostPosted: Wed Sep 07, 2005 3:33 pm    Post subject: Reply with quote

Code3TJ wrote:
So what do you want to know about? Stability or bearings?


Exactly, it's a tradeoff. The wider you go, the more stress you put on the bearings. Generally, on Jeeps with unit bearings (YJ's, TJ's, XJ's, ZJ's, etc.) the lowest backspacing (wider stance) you want to go to is around 3.75".

As far as an answer to the mathmatical questuion of how much lift vs. how much backspacing, you're talking about a range of backspacing between 3.75" to 5.5" vs. a range of lifting 0" to say 10"...that's a 1.75" spread vs. a 10" spread. It's not that critical. What's more important is that you have enough backspacing to keep the wider tires from rubbing the suspension, while keeping the tires as much under the fenders as possible...depending on what the local laws are.
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hhassey
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Joined: 22 Apr 2005
Location: Toluca Mexico

PostPosted: Thu Sep 08, 2005 3:53 pm    Post subject: Reply with quote

It's Great to live in Mexico, We don't have any regulations concerning wheels and fenders or anything like that!!!!

The mathematical Relationship that governs our question is: (Got here after some research)

DX(Y/X) = DY

where:

DX = The wider you go in one of the wheels.

Y = The original height of the center of gravity

X = Half the width of the track of the original jeep

DY = Aditional Lift of the center of Gravity


I hope that this will be usefull.
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hhassey
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Joined: 22 Apr 2005
Location: Toluca Mexico

PostPosted: Thu Sep 08, 2005 3:55 pm    Post subject: Reply with quote

Sorry my bad, rearranging

DX = X (DY)/Y
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mucker111
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Joined: 23 Jun 2005

PostPosted: Mon Sep 12, 2005 12:28 pm    Post subject: Reply with quote

You'd like to go out 2inches for every inch of lift....but that's not realistic (although it would keep the center of gravity better in line)....

1:1 is better than none...woo hoo...I can rhyme...not all the time...what a crime...ok I'll shut up now!
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Froggystyle
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Joined: 18 Feb 2006
Location: Cadiz Ohio

PostPosted: Sun Feb 19, 2006 1:48 am    Post subject: Reply with quote

hhassey wrote:
It's Great to live in Mexico, We don't have any regulations concerning wheels and fenders or anything like that!!!!
.


at least he dont have to worry about his rig walking away Mr. Green
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kizer
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Joined: 02 Jan 2004
Location: Marysville, North of Seattle

PostPosted: Sat Feb 25, 2006 5:36 pm    Post subject: Reply with quote

Theres a guy in my area running 33x14.50's. Everytime I get behind him I want to shoot his tires out. Hes running stock fender flares and man his tires are hucking rocks down the road at me.

I just put up with it and pull over and wait when he goes by.
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Drake69
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Joined: 26 Mar 2004
Location: Stormtroopin....

PostPosted: Sun Feb 26, 2006 12:53 am    Post subject: Reply with quote

kizer wrote:
I just put up with it and pull over and wait when he goes by.


rofl rofl

Pull 'em over and tell 'em to put some rear flaps on that beast! Twisted Evil Twisted Evil
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kizer
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Joined: 02 Jan 2004
Location: Marysville, North of Seattle

PostPosted: Tue Feb 28, 2006 8:33 pm    Post subject: Reply with quote

Nah its his ticket. I'll let him pay it when he gets nailed.
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Offroad Overstock
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Joined: 12 Feb 2006

PostPosted: Wed Mar 01, 2006 5:16 am    Post subject: Reply with quote

Don't worry about "stressing bearings" the effect is minimal and they are only $99 each. Worry more about rolling over on your lid! Wider is better to the point it keeps you off trails.
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