Proper backspacing - JeepForum.com

 
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post #1 of 12 Old 12-02-2010, 01:42 PM Thread Starter
joker713
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Proper backspacing

So I recently went up to 33x12.50x15 Goodyear Wrangler Duratracs. I've got the OME lift. At full lock I am now rubbing on the control arms... What is the proper back spacing for these tires so they don't rub?? Sorry for the newbie question but I searched and couldn't really find an answer. Also, I am probably going to go with 4.56 gears, and was curious if anyone has experience with this set up? Where to get good gears for a decent price?

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post #2 of 12 Old 12-02-2010, 02:12 PM
leolufse
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if the rub is really at full lock, try adjusting your steering stops.
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post #3 of 12 Old 12-02-2010, 02:15 PM
JeffBowser
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I ended up going 33x10.5 and that with wheel spacers and a couple washer under my steering stops. Granted, this was with factory Gamblers, with 5.5" of backspacing. You'll want 3.75 to 4.25 of backspacing to stop the rubbing without mods.
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post #4 of 12 Old 12-02-2010, 02:40 PM
MAMMOTH
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Most aftermarket aluminum rims will have 3.75 to 4 inches of backspacing.
If you are running stock wheels add wheel spacers to compensate.
No rubs on my jeep.

2004 TJ Rubicon - 3" lift, 1" BL, Brown Dog MML with Super brackets, 33's, Warn Winch, VanCo BBK - (Thanks MisfitSeven), IronRock tierod, Ten Factory shafts.
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post #5 of 12 Old 12-02-2010, 02:46 PM
Benderff
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Quote:
Originally Posted by joker713 View Post
So I recently went up to 33x12.50x15 Goodyear Wrangler Duratracs. I've got the OME lift. At full lock I am now rubbing on the control arms... What is the proper back spacing for these tires so they don't rub?? Sorry for the newbie question but I searched and couldn't really find an answer. Also, I am probably going to go with 4.56 gears, and was curious if anyone has experience with this set up? Where to get good gears for a decent price?
4.5" of BS will work if you're axles are centered. 4" is a more common number.
http://www.jeepforum.com/forum/f59/l...acing-1096141/

From the FAQ's section. http://www.jeepforum.com/forum/f9/fa...-my-tj-447831/
Quote:
Originally Posted by leolufse View Post
if the rub is really at full lock, try adjusting your bump stops.
You mean steering stops? If the OP has stock rims he needs to get rims with better back spacing.
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post #6 of 12 Old 12-02-2010, 04:10 PM
wadup45
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Rough country has their wheel spacers on sale today. It changes daily, so i look daily.
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post #7 of 12 Old 12-02-2010, 04:10 PM
leolufse
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Quote:
Originally Posted by Benderff View Post
You mean steering stops? If the OP has stock rims he needs to get rims with better back spacing.
Yes.
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post #8 of 12 Old 12-02-2010, 04:12 PM
2005X
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post #9 of 12 Old 12-02-2010, 08:36 PM
J03_TJ
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Put your hand behind the top of your rear tires and check to make sure you can fit your knuckles (or midway up your hand) between the rear top spring mounts and the inside of the rubber on both sides. That was a good gauge for me as to how much more I needed to move my tires out.
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post #10 of 12 Old 12-02-2010, 09:03 PM
Unlimited04
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if you have the stock wheels, you've probably ruined your rear tires by now.

check the drivers side rear spring perch:


also 33's won't fit on the 2.5" OME without at least 2" bumpstop extension front and rear. a 1.25" BL with 1" bumpstops in front, and 1.25" bumpstops in rear will work. the OME included 20mm bumpstop extensions aren't enough for the rear...shocks will bottom out, and the track bar bracket will put a dent in the tub.

to answer your question, you'll need 3.75-4.25" of backspacing to clear 33x12.50's
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post #11 of 12 Old 12-10-2010, 01:55 PM
deerassassin22
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Got a stock TJ want to get 33x12.5 or 11.5 what I got to do make them fit was going to get new rims also so what ones do I need?
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post #12 of 12 Old 12-10-2010, 03:20 PM
Jason D
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Quote:
Originally Posted by deerassassin22 View Post
Got a stock TJ want to get 33x12.5 or 11.5 what I got to do make them fit was going to get new rims also so what ones do I need?
First, learn correct grammar. Then, at a minimum, you'll need at least 2" of lift, 4" of backspacing, and steering stops... and that's only if you don't plan on going off-road. Most people will disagree, but if it's a mall crawler, it'll work. The recommended mods though would be a 2.5" suspension lift, a 1" body lift, and 3.5"-4" of backspacing.

To the OP, avoid wheel spacers if you can. A 3.5" BS on the wheels should keep you from rubbing. IMO, your best route would be steering stops, though.

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