[mattjeeperWJ]

I've got Iron Rocks 3" springs and had them in the jeep for approximately 7 months. I measured from the bottom of the rim to the bottom of the fender after the lift went in and just remeasured them for a friend. This is what I found.

After lift

FR: 770mm
FL: 770mm
RR: 790mm
RL: 780mm

and now

FR: 750mm
FL: 770mm
RR: 770mm
RL: 780mm

As I drive on the right hand side is it possible my body weight (85-90kg) has contributed to spring sag on the right hand side?

Is there another explanation?

Does anyone have any experience with spring sag, IROR in particular, or suggestions on what to look for if there is another reason?

[Reswob]

First off, no one here knows what a milimeter or kilogram is.

Second, most likely you had more than 3" of lift when you first put the springs in. They have probably just settled to 3". When I put my 3.5" springs in I measured at about 4.5-4.75" over stock, a year later I still have about 4". That's the only explanation I've got

[platinum5.9]

right but you see only his right side dropped. I'm not sure man honestly I don't know that seems weird.

[mattjeeperWJ]

Originally Posted by Reswob

First off, no one here knows what a milimeter or kilogram is.

Second, most likely you had more than 3" of lift when you first put the springs in. They have probably just settled to 3". When I put my 3.5" springs in I measured at about 4.5-4.75" over stock, a year later I still have about 4". That's the only explanation I've got

Do what I do when you guys talk inches and pounds

http://www.sciencemadesimple.com/conversions.html

The springs were a true 3". Based on measurements taken pre and post lift and also from general consensus of Grand cherokee owners in Australia!

[5.9 ANDY]

Originally Posted by Reswob

First off, no one here knows what a milimeter or kilogram is.

mabe you dont know, i do know.

mabe it dose have something to do with your body weight on that one side, i would not be supprised, but to make it sag by that much, that is what supprieses me.

mabe you should rotate your springs like you do tires so they even out.

[ArloGuthroJeep]

Originally Posted by Reswob

First off, no one here knows what a milimeter or kilogram is.

Plenty of people know what a mm is


Springs will settle after time, now as for a 10mm difference from side to side, are you even able to see that difference or is that just a measured difference?

OME puts stiffer springs on the drivers side so maybe there is some merrit to that. Have you contacted IRO and asked them?

[JCZJ]

Go to www.google.com and type <Measurement> to inches, or <weight> to lbs, or anything like that rather than say no one knows metric.

[GraKee99]

Ok to stop everyones complaining, here it is converted to inches. You're welcome.

After lift

FR: 770mm = 30.3"
FL: 770mm = 30.3"
RR: 790mm = 31.1"
RL: 780mm = 30.7"

and now

FR: 750mm = 29.5"
FL: 770mm = 30.3"
RR: 770mm = 30.3"
RL: 780mm = 30.7"

[JayJEEPguy]

So it appears you've lost almost 1" on the right side, while the left has remained the same.

[Orvisman]

Are you measuring center hub to fender? my 4" only nets 22.5 to 23" If noticeable call or email IRO do it quick cause they will be out of the shop and only have a skeleton crew fro a week or so...

[ArloGuthroJeep]

He said he measured from the bottom of the rim so they're not comparable to the normal numbers you see.

[Darthteddy]

Mabe you parked on a slope or something when you measured? ? ?

[mattjeeperWJ]

Originally Posted by ArloGuthroJeep

Plenty of people know what a mm is


Springs will settle after time, now as for a 10mm difference from side to side, are you even able to see that difference or is that just a measured difference?

OME puts stiffer springs on the drivers side so maybe there is some merrit to that. Have you contacted IRO and asked them?

Yep. Sent an email to IRO at the same time as posting this thread. I was hoping someone might have had the same experience

Originally Posted by GraKee99

Ok to stop everyones complaining, here it is converted to inches. You're welcome.

Thanks for the conversion mate

Originally Posted by Darthteddy

Mabe you parked on a slope or something when you measured? ? ?

Measured twice parked in different places that are level.

[mattjeeperWJ]

Originally Posted by ArloGuthroJeep

Plenty of people know what a mm is


Springs will settle after time, now as for a 10mm difference from side to side, are you even able to see that difference or is that just a measured difference?

OME puts stiffer springs on the drivers side so maybe there is some merrit to that. Have you contacted IRO and asked them?

I know that springs will settle after time but 20mm on only one side seemed a bit strange. I thought I could see a difference standing behind the jeep but dismissed that idea.

A mate asked for my IRO spring measurements from bottom of rim to bottom of fender. It was only after I got those measurements I remembered I had taken the measurements after the springs went in. Compared the two and found the drivers side (right hand side here in Aus) had sagged and the left side had not.