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Old 02-29-2012, 08:24 AM   #1
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Backspacing and Lift Question - JKU

I am about to pull trigger and order the AEV 2.5" lift for my 2012 JKU. I already have 18 x 9 XD Crank wheels with 285/65/18 Nitto Trail Grapplers. I believe that the Cranks have 5" backspacing and 0 offset. Will I be okay with the lift with these wheels and tires or will I need spacers? I am totally new at this lift kit thing and appreciate the great advice that is available from forum members - Thanks!

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Old 02-29-2012, 08:38 AM   #2
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Those tires are just under 11.5" wide, so you may run into problems with rubbing your swaybar end links without wheel spacers.

Might also have issues with your air dam and steering stops, but those can be fixed by trimming and adding washers to your steering stops.

The Pintlers that AEV sells are 4.7" bs, iirc, so you'll be close.

Read these...even though the first link says "stock JK", there's some good info in there regarding backspacing and tire width:

Largest tire on stock JK? Here's your answer!
Adding washers to the steering stops

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Old 02-29-2012, 09:54 AM   #3
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Quote:
Originally Posted by caveatesq View Post
I am about to pull trigger and order the AEV 2.5" lift for my 2012 JKU. I already have 18 x 9 XD Crank wheels with 285/65/18 Nitto Trail Grapplers. I believe that the Cranks have 5" backspacing and 0 offset. Will I be okay with the lift with these wheels and tires or will I need spacers? I am totally new at this lift kit thing and appreciate the great advice that is available from forum members - Thanks!
You should have no issues rubbing lock to lock or rubbing your swaybar. You are basically running close to a 33x11.5 tire with your 5" BS rims. If you add a 1.5 spacer to your already 5" BS rim will put your tires well beyond your stock flares and you may have issues with the POPO about wheel coverage as well it will put more strain on your balljoints having 3.5 BS

With the lift just be mindful of where your axles shifted as the rim may sit a little closer to the suspension components on the one side where they may rub on your Rear swaybar links or front swaybar. However, hopefully your kit came with Adj Track bars to get your axle centered again.

If you do have some minor rubbing on your front swaybar a simple fix for that is to adjust your steering stops which can take away some of your turning radius, but it's a simple adjustment
and tools you require
9/16 Socket and Wrench
(2) 3/8 washers (at minimum)

The steer stop bolt is located on your front left and right steering knuckles. Using a 9/16" socket, remove your Jeep JK Wrangler’s steer stop bolts. Start with (1) 3/8" washer in each side. Retighten bolt. Then test.
Add more if needed if you are still rubbing.
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Old 02-29-2012, 10:13 AM   #4
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Should have no issues at all. Offset is a better indicator then backspace anyways because backspace needs change with wheel width, offset is a set number. 0 offset for example means the tire and wheel will sit exactly in the center as related to the face of the hub no matter what size the wheel is.

That said 0 offset is fine for a Jeep up to 12" wide tires. 12.5" are cutting it close and really should be a -12 offset or better just to make sure but many even run 12.5" with 0 offset with no issues. Not sure why backspace is even used anymore. It can be a confusing number when changing wheel width.

So if you have a 0 offset then you will be more then fine for a 11.5" tire
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Old 02-29-2012, 11:09 AM   #5
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Thanks for all the replies.
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