Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: Vinman on June 10, 2013, 11:29:02 AM

Title: I need to fit 35's on a 2012 JK.
Post by: Vinman on June 10, 2013, 11:29:02 AM
What do I need? Strictly a street queen, will never see any offroad use.
I'd like to do this with a simple spacer lift but what else will I need?
Any links to complete budget kits will be greatly appreciated.

Also, what about keeping the traction control,  ABS and speedo working correctly?
Title: Re: I need to fit 35's on a 2012 JK.
Post by: w squared on June 10, 2013, 12:01:50 PM
Easy peasy. If you're never going to wheel it or disconnect the sway bar, you can probably just throw on the tires with a 1.5" spacer or new wheels with the correct backspacing. I've never done it myself, but I've seen it done. If you don't adjust the backspacing, the sway bar link will rub a 12.5" wide tire pretty badly on the inside sidewall - especially in the rear. You might have to trim  the rear of the pinch seam a little bit - but I doubt it. Likewise adjusting your steering stops would be a good idea - but I'd wager you've already thought of that.

Other options would be a 2" spacer kit, or flat fenders.

ABS and traction control will be just fine without doing anything to it. The computer in the JK just monitors the four ABS sensors and measures the position of the steering wheel. As long as those five data points all sing in harmony, no traction control lights will come on.

To get your speedo and odometer working properly, AEV sells a simple unit that will let you change the tire size in the computer. I think it's $200. It will only work on one JK at a time - before it can work on your VIN, it has to re-set the VIN of the first JK it programmed to factory settings. You can also use it to change DRL settings, TPMS settings, idle settings, and a bunch of stuff I don't remember.

If it has an auto transmission and did not come with the 4.10's or 3.73's, you may find that it's going to be more than just a little bit sluggish - especially if it's got the 3.8 instead of the newer pentastar.
Title: Re: I need to fit 35's on a 2012 JK.
Post by: JohnB on June 10, 2013, 01:25:39 PM
Wheel spacers or different rims to get enough backspacing and flat fenders would do it "properly".  No need for a lift.  They will clear completely under all circumstances and legally cover the wheels.  If you are really cheap, you can simply trim the stock flares as well.
Title: Re: I need to fit 35's on a 2012 JK.
Post by: w squared on June 10, 2013, 01:43:34 PM
Wheel spacers or different rims to get enough backspacing and flat fenders would do it "properly".  No need for a lift.  They will clear completely under all circumstances and legally cover the wheels.  If you are really cheap, you can simply trim the stock flares as well.


I agree that flat fenders would be a good way to do it....except a spacer lift is cheaper than a good set of flat fenders.  :o

I have seen pics of the stock fenders trimmed to make flatties. Doesn't look great - but doesn't look awful if you take your time and do it right.
Title: Re: I need to fit 35's on a 2012 JK.
Post by: BUKI on June 10, 2013, 01:56:12 PM
Vince you're such a poser. ;).
Did you sell your LJ?  I love that thing.


Sent from my iProne
Title: Re: I need to fit 35's on a 2012 JK.
Post by: Vinman on June 10, 2013, 06:32:42 PM
Vince you're such a poser. ;).
Did you sell your LJ?  I love that thing.


Sent from my iProne

No I didn't sell the LJ and buy a JK, I still like women...
Title: Re: I need to fit 35's on a 2012 JK.
Post by: specialk on June 10, 2013, 07:32:19 PM
pffffftttttt