37" tires possible with add on coils
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JK Newbie
Joined: Mar 2017
Posts: 1
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From: burton,ohio
37" tires possible with add on coils
Hello, I have a 2011 jk unlimited sahara with a 3.5 suspension lift. Im running 35" tires now but want to go up to 37". Is this possible by just replacing the coils with larger ones and keeping the stock flares? Thanks for any info.
Last edited by s.p; Mar 27, 2017 at 05:10 PM.
JK Freak
Joined: Jul 2013
Posts: 644
Likes: 5
From: Santee
You can run 37's with 2.5in lift and flat fenders so your 3.5 should be okay. You will need to run a 3.5-4in of back spacing so you don't hit frame\sway bar and full lock but bringing it out that far you may rub your fenders at full compression. you will either need to go to flat fenders or adjust your bump stops. You will also need to trim pinch seams more in the rear.
JK Freak
Joined: Jun 2014
Posts: 782
Likes: 3
From: Pittsburgh, Pa
I use a Rock Krawler 3.5" spring and 1.25" body lift and use bump stops to stop my shock shafts at about 1/2" from full collapse. Disconnected and at full twist, I touch my flares enough to make noise, but not enough to hurt them with 37x13.5 tires. Jeep took care of the cutting on the 14+ unless you push the rear axle back with aftermarket arms.
3" bump in front and 4" in rear.
JK Freak
Joined: Jan 2013
Posts: 666
Likes: 8
From: Charlotte NC
With stock control arms and 2014+ model, you do not have to trim anything at all aside from the Rubicon rock rails if you have them. I use a Rock Krawler 3.5" spring and 1.25" body lift and use bump stops to stop my shock shafts at about 1/2" from full collapse. Disconnected and at full twist, I touch my flares enough to make noise, but not enough to hurt them with 37x13.5 tires. Jeep took care of the cutting on the 14+ unless you push the rear axle back with aftermarket arms. 3" bump in front and 4" in rear. <img src="https://www.jk-forum.com/forums/attachment.php?attachmentid=669281"/> <img src="https://www.jk-forum.com/forums/attachment.php?attachmentid=669282"/> <img src="https://www.jk-forum.com/forums/attachment.php?attachmentid=669283"/> <img src="https://www.jk-forum.com/forums/attachment.php?attachmentid=669284"/>
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JK Junkie
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So it sounds like you plan on keeping the factory flares. If that is the case and you plan on using it off road them you may want to look at some 4" springs. That being said, to run 37's you will want to address other things as well.