3.25" lift, 37s and stock flares. Can it be done?
37"-32"=5"
5"/2=2.5"
You only need 2.5" of lift to clear 37's as they are only 2.5" taller then the the factory 32" tires.
The real issue is the clearance needed to turn the front wheels without rubbing on the frame or control arms. Shoot for a wheel back spaciing of 3.5" for a 37"x12.5" wide tire.
Shock length and bump stops will also have an effect on what kind of clearance you need due to axle shift and rotation at different points in the suspension travel.
5"/2=2.5"
You only need 2.5" of lift to clear 37's as they are only 2.5" taller then the the factory 32" tires.
The real issue is the clearance needed to turn the front wheels without rubbing on the frame or control arms. Shoot for a wheel back spaciing of 3.5" for a 37"x12.5" wide tire.
Shock length and bump stops will also have an effect on what kind of clearance you need due to axle shift and rotation at different points in the suspension travel.
I'm planning on running the stock moabs with 1.5" or 2.0" wheel spacers. I have the 1.5" now, but after I get the tires mounted, I'll know which to go with.
My Jeep came with a budget boost of some sort and 285/70 on 17x9 steelies/5.25" bs. I measured this morning, and currently have 4.75" from top of tire to bottom of flare front clearance, 6.5" rear. Never any rubbing problems.
I found this picture online and like this trim job. This is about as much as I'd be willing to trim.

If I end up going to flatties, I'll probably end up selling front and rear bumpers and go with something that will look better. That's something I want to avoid though.
I took that Jeep off road all the time, but not with the stock flares on it. The tires rubbed pretty bad, even on the street, with stock flares. I've done the low COG approach, as you can see in the picture, and I've done a more conventional lift. The low COG approach looks good, but it doesn't work very good. Up travel is very limited, and off road ride quality suffers because of that. You have to go a lot slower, and still spend a lot of time on the bump stops. That Jeep had a 2 1/2" lift and 37s; my current Jeep has a 3" lift and 35s, and it works a whole lot better. You really need that little bit of extra up travel.
Not sure how you define articulation? A stock JK has something like 8" of travel. Let's say you go to 37s and 10" travel shocks. When you add 4" of bump stop, you now have 6" of travel. Sure, your tire will droop another couple inches, but it can't stuff nearly as much. And that makes for poor offroad manners, especially in rocks or off camber.
Not sure how you define articulation? A stock JK has something like 8" of travel. Let's say you go to 37s and 10" travel shocks. When you add 4" of bump stop, you now have 6" of travel. Sure, your tire will droop another couple inches, but it can't stuff nearly as much. And that makes for poor offroad manners, especially in rocks or off camber.
I took that Jeep off road all the time, but not with the stock flares on it. The tires rubbed pretty bad, even on the street, with stock flares. I've done the low COG approach, as you can see in the picture, and I've done a more conventional lift. The low COG approach looks good, but it doesn't work very good. Up travel is very limited, and off road ride quality suffers because of that. You have to go a lot slower, and still spend a lot of time on the bump stops. That Jeep had a 2 1/2" lift and 37s; my current Jeep has a 3" lift and 35s, and it works a whole lot better. You really need that little bit of extra up travel.
My tires were 12.50s. For 37s and stock flares I wouldn't do less than 4" lift. But if you're trimming the fenders like in that picture, 3.25" of lift is probably going to be fine, and allow you to run a little shorter bumpstop. Those trimmed fenders look nice by the way; thats the best trimming job I've seen on stock fenders. They usually look like something farm built.
Last edited by MOPWR2U; Oct 6, 2014 at 10:29 AM.
Down travel is limited by your shock. Coils can only extend so far, so you can't just get an even longer shock. Point is, you'll have less "articulation" than a bone stock JK.
I took that Jeep off road all the time, but not with the stock flares on it. The tires rubbed pretty bad, even on the street, with stock flares. I've done the low COG approach, as you can see in the picture, and I've done a more conventional lift. The low COG approach looks good, but it doesn't work very good. Up travel is very limited, and off road ride quality suffers because of that. You have to go a lot slower, and still spend a lot of time on the bump stops. That Jeep had a 2 1/2" lift and 37s; my current Jeep has a 3" lift and 35s, and it works a whole lot better. You really need that little bit of extra up travel.
Lift height does not make a difference in terms of articulation/travel/flex. A coil has an extended and compressed length, the difference is the max amount of travel (assuming a shock is perfectly matched to it). I can take a 2.5" coil and add a little spring rate and make a Jeep sit at 3.5". What changes? Nothing. Still the same max and min points. Still the same amount of bump stop needed.
So the consensus is my jeep won't automatically taco with my plan, so I'll throw the lift on there 1st and compare clearance numbers. If I'll be riding the bump stops, then I'll look into trimming.
Thanks for the replies guys.
Thanks for the replies guys.




