When ordering a 392, why so many XRs?

path0s

Well-Known Member
First Name
Mike
Joined
Jan 4, 2022
Messages
55
Reaction score
78
Location
Goose Creek, SC
Vehicle(s)
2021 JLUR XR
Personally, I bought the XR(392 or 3.6) for the HD M210. Thicker tubes, cast knuckles, etc.

Just makes the decision of 37s that much easier.
 

gato

Well-Known Member
Joined
Apr 4, 2021
Messages
746
Reaction score
996
Location
New England
Vehicle(s)
2021 JLUR
If you are pending $80K on Wrangler, why not spend 5% more and get 4.56, 35s (that can be readily sold if you go 37s), stronger axles, tailgate reinforcement and and spare tire relocation (again helping with 37s) and the wider fenders to keep 35s or 37s road legal?

I think this thread should be asking why is the XR not standard on the 392.
 

path0s

Well-Known Member
First Name
Mike
Joined
Jan 4, 2022
Messages
55
Reaction score
78
Location
Goose Creek, SC
Vehicle(s)
2021 JLUR XR
392 has that stock…. Non 392 I agree with the XR package BTW.
Yea, HD tubes being 10mm, it's more stout than the Ultimate 44, which is about 8mm tubes. And ultimate 44s are rated for 37s I believe.


FAD is definitely a breaking point, but all the breaks I've seen are from accidents.(hitting trees, cars, etc)

RCVs, HD ball joints, and should hold up nicely. I'm kinda curious if the 392 and XR ball joints are upgraded.
 

path0s

Well-Known Member
First Name
Mike
Joined
Jan 4, 2022
Messages
55
Reaction score
78
Location
Goose Creek, SC
Vehicle(s)
2021 JLUR XR
If you are pending $80K on Wrangler, why not spend 5% more and get 4.56, 35s (that can be readily sold if you go 37s), stronger axles, tailgate reinforcement and and spare tire relocation (again helping with 37s) and the wider fenders to keep 35s or 37s road legal?

I think this thread should be asking why is the XR not standard on the 392.
Gato, side topic. But sort of related to the XR, did your JLR not come with a skid under the FAD module? I ask because mine has a skid under it from factory.
 
OP
OP
stumblinhorse

stumblinhorse

Well-Known Member
Joined
Dec 17, 2021
Messages
85
Reaction score
83
Location
Colorado
Vehicle(s)
2021 392
If you are pending $80K on Wrangler, why not spend 5% more and get 4.56, 35s (that can be readily sold if you go 37s), stronger axles, tailgate reinforcement and and spare tire relocation (again helping with 37s) and the wider fenders to keep 35s or 37s road legal?

I think this thread should be asking why is the XR not standard on the 392.
Things not stock on the 392 is 4.56, tailgate reinforcement, spare relo, 1/2“ wider rim and small KO2 315s instead of 285s, mopar shocks. Everything else is stock.
My point is rims and tires are mostly taken off for something bigger/wider. Tailgate reinforcement and relo bracket is meh…. 35s fit on my carrier stock. I got the reinforcement as a separate option.
 

path0s

Well-Known Member
First Name
Mike
Joined
Jan 4, 2022
Messages
55
Reaction score
78
Location
Goose Creek, SC
Vehicle(s)
2021 JLUR XR
Things not stock on the 392 is 4.56, tailgate reinforcement, spare relo, 1/2“ wider rim and small KO2 315s instead of 285s, mopar shocks. Everything else is stock.
My point is rims and tires are mostly taken off for something bigger/wider. Tailgate reinforcement and relo bracket is meh…. 35s fit on my carrier stock. I got the reinforcement as a separate option.
But, this relocation from mopar does fit a 37.
 
OP
OP
stumblinhorse

stumblinhorse

Well-Known Member
Joined
Dec 17, 2021
Messages
85
Reaction score
83
Location
Colorado
Vehicle(s)
2021 392
I think if you’re rollin with 37s, the tailgate ain’t gonna hold up even with the reinforcement.
 

2nd 392

Well-Known Member
First Name
Mike
Joined
Jun 20, 2021
Messages
462
Reaction score
578
Location
Ca
Vehicle(s)
Grand Cherokee srt.V10 Dodge 4x
Things not stock on the 392 is 4.56, tailgate reinforcement, spare relo, 1/2“ wider rim and small KO2 315s instead of 285s, mopar shocks. Everything else is stock.
My point is rims and tires are mostly taken off for something bigger/wider. Tailgate reinforcement and relo bracket is meh…. 35s fit on my carrier stock. I got the reinforcement as a separate option.
Agree, and would like to add that 4.56’s are overkill with 35’s. Comparable rpm to mph of 373 gears and 33’s is 410’s and 36’s, 456’s and 38’s or 39’s( forget witch) so If you are not going bigger than 35’s a re-gear to 410’s is cheaper. But if you want 37’s XR is a no brainer.
 

path0s

Well-Known Member
First Name
Mike
Joined
Jan 4, 2022
Messages
55
Reaction score
78
Location
Goose Creek, SC
Vehicle(s)
2021 JLUR XR
Agree, and would like to add that 4.56’s are overkill with 35’s. Comparable rpm to mph of 373 gears and 33’s is 410’s and 36’s, 456’s and 38’s or 39’s( forget witch) so If you are not going bigger than 35’s a re-gear to 410’s is cheaper. But if you want 37’s XR is a no brainer.
I will admit, the 4.56 with 35s and the 8spd auto, even on the 3.6 moves like a freight train 0-60 considering its a jeep.
 
OP
OP
stumblinhorse

stumblinhorse

Well-Known Member
Joined
Dec 17, 2021
Messages
85
Reaction score
83
Location
Colorado
Vehicle(s)
2021 392
I will admit, the 4.56 with 35s and the 8spd auto, even on the 3.6 moves like a freight train 0-60 considering its a jeep.
I would have bought an XR package for my 6sp JKUR in a second. No doubt, non 392 it is a no brainer for any jlur. Just think it is not a great value for a 392.
 

veddersbetter

Member
Joined
Nov 20, 2021
Messages
13
Reaction score
15
Location
Thomson IL
Vehicle(s)
2021 Hydro Blue Rubicon 392XR
Youre adding quite a bit for $4k actually.
35's
17x8" rim (which is fine for a 37x12.5)
Tailgate reinforcement
Brake vac booster (which isnt listed)
4.56 gears
Revalved shocks.. although NOT Fox they are monotube and tuned for the heavier weight of the 35's.
Among other trivial things... all factory warrantied

I do agree however because the standard 392 already comes with a lot of the standard Rubicon XR features (beadlock capable wheels... axles) already... it should be a cheaper option than other trims. Much like the SOT top is a cheaper option since body colored hardtop is standard on the 392
 
OP
OP
stumblinhorse

stumblinhorse

Well-Known Member
Joined
Dec 17, 2021
Messages
85
Reaction score
83
Location
Colorado
Vehicle(s)
2021 392
17x8" rim (which is fine for a 37x12.5)
Everyone keeps saying that 37s on 8” rims are fine. Then why does every manufacturer not say that, not one…. I know they will mount them up. So is that it? Why have that spec at all then? next time you are with your off road buddies, see how many 37s are mounted on 8”s… aired down….
 
Last edited:

veddersbetter

Member
Joined
Nov 20, 2021
Messages
13
Reaction score
15
Location
Thomson IL
Vehicle(s)
2021 Hydro Blue Rubicon 392XR
Everyone keeps say that 37s on 8” rims are fine. Then why does every manufacturer not say that, not one…. I know they will mount them up. So is that it? Why have that spec at all then? next time you are with your off road buddies, see how many 37s are mounted on 8”s… aired down….
Probably the majority of them as thats a very common rim width. And fwiw they are 8.5" wide if using the actual beadlock rings... which if youre going to air it down regularly... I would.

Also.. I see 8" rim recommended all over the place. One half inch isn't going to make or break it regardless

37x12.508-9.5

Ya know... Jeep "recommends" you dont run anything but factory tire or wheel size on any Wrangler.
 
Advertisement

Smart Stop Start
 
Advertisement
Top