Actual height difference between Rubicon and Rubicon XR?

[Riverjeep]

Charts are great, try measuring them on the Jeep, at the psi you normally run though. Granted I only run 30 psi on the street so at the 40+ the dealers run they might measure closer to the specs.

No doubt but I understood his question for one of factory specs which I gave.

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[Zandcwhite]

No doubt but I understood his question for one of factory specs which I gave.

The dimensions given by bfg are over estimates on every vehicle ever. Air them up to 100psi, they still won't measure those listed dimensions you gave.

 

[jadmt]

Visual difference both brand new

 

[Templecruiser]

Visual difference both brand new

Hard telling from pics, but don't see any real big difference. I was wondering if the xr really has any lift as it is not mentioned on window sticker. Many have put 35 on stock rubicons.

 

[jadmt]

Hard telling from pics, but don't see any real big difference. I was wondering if the xr really has any lift as it is not mentioned on window sticker. Many have put 35 on stock rubicons.

There is a lift. I have a standard 24 rubicon and i have two buddies with xr’s and have installed lifts on all 3 and the xr’s have a lift. Thereare differences in bump stops and r
track bar locations, swaybar links, shocks are longer etc.

 

[Zandcwhite]

There is a lift. I have a standard 24 rubicon and i have two buddies with xr’s and have installed lifts on all 3 and the xr’s have a lift. Thereare differences in bump stops and r
track bar locations, swaybar links, shocks are longer etc.

None of which lift anything. I know on ours it was only 1.5" taller than a stock Rubicon parked next to it on the lot. 1" of that is from the tires so yes there's a lift...of about 1/2" .

 

[Riverjeep]

The dimensions given by bfg are over estimates on every vehicle ever. Air them up to 100psi, they still won't measure those listed dimensions you gave.

I think you are right there, I measured my factory 285's and only got slightly over 32 inches on the ground which of course is where it matters.

 

[AnnDee4444]

I’d be more curious to see what measurement people are getting as in the image below. Seems like it would be a lot more accurate data. Include what changes have been made like going from OEM plastic bumpers to metal bumper with a winch etc

Here are a few generic shock eye-to-eye lengths that I've been using. These could be +/- 0.5" (or more...) depending on the Jeep, but are a rough average of where each one sits.

Model	Front shock eye-to-eye @ ride height	Rear shock eye-to-eye @ ride height
Sport	18.5"	21.2"
Rubicon	20.0"	22.5"
XR	21.0"	24.0"

 

[Terrymo]

Here are a few generic shock eye-to-eye lengths that I've been using. These could be +/- 0.5" (or more...) depending on the Jeep, but are a rough average of where each one sits.

Model	Front shock eye-to-eye @ ride height	Rear shock eye-to-eye @ ride height
Sport	18.5"	21.2"
Rubicon	20.0"	22.5"
XR	21.0"	24.0"

Do you prefer the shock measurement over the axle tube to bottom of upper spring cup lip? If so, why? I see you’ve consolidated lots of data on the forum. Much appreciated!

 

[AnnDee4444]

Regarding tire height: the data given here shows that you can't really rely on the advertised size. For example, a "35" a.k.a. 315/70R17 is advertised as 34.4" with 604 revs/mile. But if you calculate 604 revs/mile you get a tire that is 33.39" tall. I think this means there's 1.01" of tire sag.


For the KO2s available in 2020, I calculated the average rolling diameter to be about 97.1% of the advertised height.

For those concerned with tire sag, I've compared all the BFG K02 specs listed on this site. By calculating their revolutions/mile off of their advertised diameter then comparing this to their advertised revolutions/mile, I can get a good idea of their effective diameter vs the measured. All were within 96.8%-97.3%, with the average at 97.1%. The range is most likely due to rounding errors, since they only list the diameters in tenths of an inch.

I'm sure other types of tires could be different, depending on compound used or construction methods, but 97.1% is the percentage that I've decided to use in my calculator when the user inputs tire height. I've also added a revolutions/mile option if it is known.

Here's the data I used:

Advertised Revs/Mile	Advertised Diameter	Calculated Diameter	% Difference
751	27.6''	26.86''	97.30%
721	28.9''	27.97''	96.79%
705	29.5''	28.61''	96.97%
682	30.5''	29.57''	96.96%
659	31.5''	30.60''	97.16%
640	32.5''	31.51''	96.96%
640	32.5''	31.51''	96.96%
602	34.5''	33.50''	97.11%
770	27.0''	26.19''	97.01%
746	27.8''	27.04''	97.25%
732	28.4''	27.55''	97.01%
710	29.2''	28.41''	97.28%
718	28.9''	28.09''	97.19%
656	31.7''	30.74''	96.98%
704	29.5''	28.65''	97.11%
683	30.4''	29.53''	97.13%
691	30.0''	29.19''	97.29%
679	30.6''	29.70''	97.07%
657	31.6''	30.70''	97.14%
667	31.1''	30.24''	97.23%
634	32.8''	31.81''	96.98%
623	33.3''	32.37''	97.21%
634	32.8''	31.81''	96.98%
602	34.5''	33.50''	97.11%
730	28.5''	27.63''	96.94%
654	31.8''	30.84''	96.98%
704	29.5''	28.65''	97.11%
681	30.5''	29.62''	97.10%
660	31.5''	30.56''	97.01%
691	30.1''	29.19''	96.97%
669	31.1''	30.15''	96.93%
649	32.0''	31.08''	97.11%
681	30.5''	29.62''	97.10%
657	31.6''	30.70''	97.14%
657	31.6''	30.70''	97.14%
657	31.6''	30.70''	97.14%
669	31.1''	30.15''	96.93%
646	32.2''	31.22''	96.96%
635	32.7''	31.76''	97.13%
635	32.8''	31.76''	96.83%
614	33.9''	32.85''	96.89%
638	32.6''	31.61''	96.97%
604	34.4''	33.39''	97.07%
604	34.4''	33.39''	97.07%
640	32.5''	31.51''	96.96%
621	33.5''	32.48''	96.95%
602	34.5''	33.50''	97.11%
569	36.5''	35.44''	97.11%
717	29.0''	28.13''	96.99%
648	32.0''	31.12''	97.26%
682	30.5''	29.57''	96.96%
659	31.5''	30.60''	97.16%
637	32.6''	31.66''	97.12%
648	32.0''	31.12''	97.26%
627	33.2''	32.17''	96.89%
661	31.4''	30.51''	97.17%
639	32.5''	31.56''	97.11%
619	33.5''	32.58''	97.26%
597	34.8''	33.78''	97.08%
601	34.6''	33.56''	96.99%
640	32.5''	31.51''	96.96%
621	33.5''	32.48''	96.95%
602	34.5''	33.50''	97.11%
640	32.5''	31.51''	96.96%
652	31.8''	30.93''	97.27%
630	32.9''	32.01''	97.30%
610	34.0''	33.06''	97.24%
643	32.4''	31.37''	96.81%
622	33.5''	32.42''	96.79%
602	34.5''	33.50''	97.11%
635	32.8''	31.76''	96.83%
613	33.9''	32.90''	97.05%
592	35.1''	34.07''	97.06%
626	33.2''	32.22''	97.04%
588	35.3''	34.30''	97.17%
640	32.5''	31.51''	96.96%
602	34.5''	33.50''	97.11%
569	36.5''	35.44''	97.11%

 

[AnnDee4444]

Do you prefer the shock measurement over the axle tube to bottom of upper spring cup lip? If so, why? I see you’ve consolidated lots of data on the forum. Much appreciated!

Yes, because it makes choosing shocks & bump stops much easier. The axle tube method is quicker, but only really useful for comparing ride heights.

 

[Zandcwhite]

According to the shock eye to eye measurements from above, there's still only a 1" lift not 1.5". Unfortunately they aren't all identical from the factory and some seem to sit only 1/2" higher, some are closer to an inch. I've yet to see anyone with a full 1.5" of actual suspension when measuring either eye to eye or axle to front spring perch.

 

[Terrymo]

According to the shock eye to eye measurements from above, there's still only a 1" lift not 1.5". Unfortunately they aren't all identical from the factory and some seem to sit only 1/2" higher, some are closer to an inch. I've yet to see anyone with a full 1.5" of actual suspension when measuring either eye to eye or axle to front spring perch.

Yes I’m happy with the XR package except I didn’t understand what the factory “lift” really meant. I guess that’s my fault for not doing better research.

 

[AnnDee4444]

According to the shock eye to eye measurements from above, there's still only a 1" lift not 1.5". Unfortunately they aren't all identical from the factory and some seem to sit only 1/2" higher, some are closer to an inch. I've yet to see anyone with a full 1.5" of actual suspension when measuring either eye to eye or axle to front spring perch.

My JLR was 21"+ in the front when new... higher than many XRs. Jeep really doesn't have any ride height consistency.

 

[proptied]

My XR with factory winch seems to include the correct front springs, finally (IMO). I was at 21.50" (front) shock eye-to-eye.

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