JKOwners Forum banner

40" tires.... lift and belly ?

5.4K views 18 replies 10 participants last post by  abendx  
#1 ·
I got a weird question... I want to know what my lift height is.

Now this is not going to be scientific, but will give me a ballpark.

So... if you have 40s:

What lift are you running (brand and height), what is your belly height, and what brand of tires are you running?

I'll start with what I have...

Lift: Custom w/ unknown height
Belly: 24"
Tires: 40" MTRs


I figure with a few others chiming in I'll get a good idea how well I compete with Draken :thefinger:
 
#5 ·
Frame rail down then minus 2.75" for gas tank and skid that usually lines up with the other skids as far as lowest point unless you've removed your tank.

Mine on 37s 4" lift was 16.5 from tank skid to ground 19.25" from ground to rail.

This is part of the reason I went 2 door and gonna stretch.
 
#9 ·
Looks like from your numbers you should be around 8"-9" of lift.
I am running 40" mtr's with a belly height of 19.75" at the cross member which has been raised by 3/4" running 4" of lift on my coil overs.
 
#12 ·
Looks like from your numbers you should be around 8"-9" of lift.
Nice... if this turns out to be the case, I might be able to return Draken to full grace with their eight inch kit... then again, mine may just be the ultimate roller coaster?

Instead of belly, use frame rail height. That's a consistent point on all JK's, assuming the frame hasn't been drastically modified. Frame rail height w/ X" tires is my personal favorite for comparing the height of two rigs. "Lift height" is wishy washy and kind of pointless.
Great idea... frame rail height at the tranny crossmember should be a good reference point.

Using this as a reference, mine is going to be an additional three inches taller!?!? That can't be right... my JK is pretty big, but not that big. 11-12" of lift?

I typically use the measurement of the distance between the center of the axle to the bottom of the frame rail above it to measure the true amount of lift.

Some will also use the distance between shock mounts, although that will only work on stock components.
Hmm... unfortunately for me, I fall prey to the second problem on the first suggestion. I like that as a measure point though... just will not work for me. I'd guess any stretch might make this a variable as well?
 
#11 ·
I typically use the measurement of the distance between the center of the axle to the bottom of the frame rail above it to measure the true amount of lift.

Some will also use the distance between shock mounts, although that will only work on stock components.
 
#13 ·
abendx,

What is the height of a stock JK frame rail and what is the true height of the tire? What is your height and what is the true height of the tire?

For example, a stock TJ on true 28" tires sits 14" at the frame rail. Mine on true 36.5" tires sits 19.5" at the frame rail.

36.5-28 = 8.5
8.5/2 = 4.25" height from the tires alone.
19.5-14 = 5.5"
5.5-4.25 = +1.25" between the frame and axles (springs)

What are you doing wrong?
 
#17 ·
I posted this one in the wrong thread earlier. Oops.

43" rubber
20" Wheels
22" gas tank skid to ground.
3" or so TnT lift with remnants of EVO DTD and lever.
122ish" wheelbase

Image




(I had a JKU enclosed hauler built hence the measurements)