XR observations

[Alpha143]

I'm definitly not looking to put a cheap bandaid on it. I am not ready to commit so coil overs or some crazy $5,000 suspension just yet.

But I do want to fix it the correct way. I've done springs on my RZR so that shouldn't be a big deal ..

So you're saying changing the springs only, is possible to give me more up travel ? Do I loose down travel ?

Has anyone done this and have part numbers ? Or do I need to weigh the jeep / mods to determine which springs to get ?

I have 3/4" up travel at best, measured las t night. . .going wheeling Saturday and will pay close attention to how it wheels with such little up travel..

When I took it to Moab, it seemed like the tire would go in the air WAY TOO SOON ... felt like IFS. ..

Are you saying you only have 3/4 inch of travel on a stock XR? I'm about to purchase one, which makes me pause for concern.

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[Mocopo]

Are you saying you only have 3/4 inch of travel on a stock XR? I'm about to purchase one, which makes me pause for concern.

3/4" of UP travel. There is additional downtravel as well, quite a few more inches... I actually don't know if anyone has posted the total travel distance yet in this thread. Anyone know it?

 

[AnnDee4444]

Very true on the longer shocks, but is it good to note that is why most people seem to be recommending the Fox 2.0 shocks for 2-3" lift. It gives you 2 extra inches of travel without overextending the stock XR spring.

I'm pretty sure people are running these on stock height non-XR Rubicons with 5/8" bump stop extensions. Extended length is 26.25" for the IFPs, which would almost work on a Sport spring. I'm sure they would be fine on an XR.

If my math is correct, a fully compressed XR/diesel/392 suspension gives a shock eye-to-eye length of 17-5/8" (which is 1-3/8" more than non-XR)

Front Shock	Compressed Length	Extended Length	Shock Stroke	Wasted Shock Stroke	Usable Shock Stroke
OEM XR (olive sticker)	17.25"	24.38"	7.125"	0.375"	6.75"
OEM 392 (bronze sticker)	16.75"	24.75"	8"	0.875"	7.125"
non-XR Rubicon (red) with 2" shock extension & 3/8" bump stop extension	17.75"	25.625"	7.875"	0.25"	7.625"
Mopar 2" lift	17.5"	26.25"	8.75"	0.125"	8.625"
Fox IFP 2"-3" lift	16.75"	26.25"	9.5"	0.875"	8.625"
Fox IFP 3.5"-4" lift shocks with 3/8" bump stop extension	17.80"	28.40"	10.6"	0.2"	10.4"

 

[Mocopo]

I'm pretty sure people are running these on stock height non-XR Rubicons with 5/8" bump stop extensions. Extended length is 26.25" for the IFPs, which would almost work on a Sport spring. I'm sure they would be fine on an XR.

If my math is correct, a fully compressed XR/diesel/392 suspension gives a shock eye-to-eye length of 17-5/8" (which is 1-3/8" more than non-XR)

Front Shock	Compressed Length	Extended Length	Shock Stroke	Wasted Shock Stroke	Usable Shock Stroke
OEM XR (olive sticker)	17.25"	24.38"	7.125"	0.375"	6.75"
OEM 392 (bronze sticker)	16.75"	24.75"	8"	0.875"	7.125"
non-XR Rubicon (red) with 2" shock extension & 3/8" bump stop extension	17.75"	25.625"	7.875"	0.25"	7.625"
Mopar 2" lift	17.5"	26.25"	8.75"	0.125"	8.625"
Fox IFP 2"-3" lift	16.75"	26.25"	9.5"	0.875"	8.625"
Fox IFP 3.5"-4" lift shocks with 3/8" bump stop extension	17.80"	28.40"	10.6"	0.2"	10.4"

So if I'm reading that right, stock XR should come with 6.75" of total wheel travel in the front?

 

[stumblinhorse]

I'm pretty sure people are running these on stock height non-XR Rubicons with 5/8" bump stop extensions. Extended length is 26.25" for the IFPs, which would almost work on a Sport spring. I'm sure they would be fine on an XR.

If my math is correct, a fully compressed XR/diesel/392 suspension gives a shock eye-to-eye length of 17-5/8" (which is 1-3/8" more than non-XR)

Front Shock	Compressed Length	Extended Length	Shock Stroke	Wasted Shock Stroke	Usable Shock Stroke
OEM XR (olive sticker)	17.25"	24.38"	7.125"	0.375"	6.75"
OEM 392 (bronze sticker)	16.75"	24.75"	8"	0.875"	7.125"
non-XR Rubicon (red) with 2" shock extension & 3/8" bump stop extension	17.75"	25.625"	7.875"	0.25"	7.625"
Mopar 2" lift	17.5"	26.25"	8.75"	0.125"	8.625"
Fox IFP 2"-3" lift	16.75"	26.25"	9.5"	0.875"	8.625"
Fox IFP 3.5"-4" lift shocks with 3/8" bump stop extension	17.80"	28.40"	10.6"	0.2"	10.4"

What about the fox 392 shocks!! Wish you had those.

 

[191185]

Are you saying you only have 3/4 inch of travel on a stock XR? I'm about to purchase one, which makes me pause for concern.

I have the nextventure aluminum front bumper, and the zion s10 warn winch. I wish I would have checked before the mods but I didn't.

When I was wheeling in Moab it was 100% stock with the plastic bumper..

I would definitly buy the XR again if I was to do it all over, I love the 4.56 gears, brakes are awsome (i've read the stock brakes are average at best, and suck once you add heavy wheels/tires) . to me the whole package is easily worth $4,000 ..

I'm still learning obviously, but it looks like the fix could cost as little as $40 ( Teraflex spacers ) to worst case $1600 for a proper 2.5" lift kit .. .

I dont think I could re-gear, get wheels tires, brakes, and any lift for under $4000 .. And the places I've gone wheeling so far, I'm definitly glad I'm not on 33's like a stock rubicon. .

 

[Apexcars]

What about running the Bilstein 5100. 24-310635 I don't know much about suspension stuff so I may be asking dumb questions. Is the collapsed length just too long? My understanding is that these are nicer on road and quite a bit cheaper. Also, I've heard they last longer than the Fox

 

[AnnDee4444]

So if I'm reading that right, stock XR should come with 6.75" of total wheel travel in the front?

Up-down, yes. But when flexing, the front wheel will experience more travel than the shocks due to the shocks mounting location being inboard from the wheel. Different axle widths or offsets will change how much more.

What about the fox 392 shocks!! Wish you had those.

They're on there as the OEM 392 shocks (bronze sticker). I believe the OEM 392 XR shocks are not Fox & similar to the 2.0/3.6 XR, but don't have any reliable info yet.

And ironically I do actually have these on my JLR.

What about running the Bilstein 5100. 24-310635 I don't know much about suspension stuff so I may be asking dumb questions. Is the collapsed length just too long?

Collapsed length is 18.31", so you would need to run at least a 3/4" bump stop extension. For stock XR bump stops, a 33-292625 would work (17.07" collapsed length, 9.225" usable stroke).

Someone else will need to comment on the ride quality & longevity.

 

[Apexcars]

So, that Bilstein shock plus a spacer lift should get better up and down travel on an XR and increase that gap between the bump stops while still using factory springs?

 

[AnnDee4444]

So, that Bilstein shock plus a spacer lift should get better up and down travel on an XR and increase that gap between the bump stops while still using factory springs?

Correct. I've always heard that your ride height should be in the middle 1/3 of shock stroke, which would be about 3" of bump travel (although Accutune recommends 4" for rock crawling). Assuming you have 1" of bump travel now, either a 2" spring spacer or 3.5" lift spring will get you to the middle 1/3 of the shock.

 

[Apexcars]

Thanks, I appreciate your help.

 

[ColoradoMike]

I got my XR out on a trail for the first time. For reference, I am one of the ones who only has like .7 inches of bump stop gap. All in all, I thought it performed well enough and I was generally happy. Moab will be a better test. I had fun, though.

 

[191185]

So, that Bilstein shock plus a spacer lift should get better up and down travel on an XR and increase that gap between the bump stops while still using factory springs?

Is this a better option then just getting stiffer springs only ?

do stiff springs make the jeep "bouncy" when climbing ... I"m thinking of all thos older videos of JK's kind of "bouncing" before they roll over . . .

 

[Apexcars]

It’s not just a matter of stiffer springs. You could get longer springs that are the same rate you just need to make sure that the shocks have enough up travel so that you still bottom out on the bump stops instead of the shocks.

 

[191185]

What is the downside to buying longer springs at the same rate and leaving everything else stock?

If there is no downside, I am wondering why Jeep didn't do this from the factory ..

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