37's on Rubicon with 1.5" level?

[RacerX]

Picking up my Rubicon tomorrow. Here’s what it looks like with a Alloy USA 1.5” leveling kit / 35’s (35x12.5x17)

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[Renegade]

Picking up my Rubicon tomorrow. Here’s what it looks like with a Alloy USA 1.5” leveling kit / 35’s (35x12.5x17)

That looks great! Could you measure the height of your Jeep at the highest point of the cab?

 

[RacerX]

That looks great! Could you measure the height of your Jeep at the highest point of the cab?

Just under 76 inches.

 

[Renegade]

Just under 76 inches.

Wow! I thought the stock height was 76”. This is good news for me. Thanks.

 

[Jeepdude413]

Picking up my Rubicon tomorrow. Here’s what it looks like with a Alloy USA 1.5” leveling kit / 35’s (35x12.5x17)

Looks awesome. How are those shock extensions? Quality or iffy? Wanting to buy same kit so any info u can provide would be greatly appreciated.

 

[Chance_P]

Looks awesome. How are those shock extensions? Quality or iffy? Wanting to buy same kit so any info u can provide would be greatly appreciated.

I just installed the kit on mine tonight. No complaints or concerns. Directions would have been nice but not necessary. Don't reinstall the rubber isolators on the front, the poly spacers in the alloy kit are not designed to be used in conjunction with them

 

[RacerX]

Looks awesome. How are those shock extensions? Quality or iffy? Wanting to buy same kit so any info u can provide would be greatly appreciated.

That was my biggest concern before getting the kit. The extensions should do a good job and I don’t have any hesitation using them on just a 1.5” level. I’d be “shocked” if they ever failed (sorry had to do it).

 

[Jeepdude413]

That was my biggest concern before getting the kit. The extensions should do a good job and I don’t have any hesitation using them on just a 1.5” level. I’d be “shocked” if they ever failed (sorry had to do it).

Lol. Can’t pass up a chance to be funny that easy. I appreciate the info. Gonna order today. Happy Jeepin

 

[Jeepdude413]

I just installed the kit on mine tonight. No complaints or concerns. Directions would have been nice but not necessary. Don't reinstall the rubber isolators on the front, the poly spacers in the alloy kit are not designed to be used in conjunction with them

Thanks for the input. Seems there is confidence in the kit. Gonna give it a whirl.

 

[Alabama Mud Machine]

Hate to revive an old thread, but thinking about getting this kit to run 35's, possibly 37's, on my new 2020 JTR... Are the shock extensions made of metal or composite material? They almost look composite in the photos...

What width 37" mud tires are most of yall running on say a 10" wide wheel? Also what BS should I go with? Not new to offroad trucks or lifts, just new to Jeeps.

Thanks!

 

[Deleted member 28696]

I'll be watching this thread. I have a Rubicon on order and should have my Alloy USA leveling kit delivered today. I'm undecided on tire size, though I'm heavily leaning towards 35's.

I have a 2021 Rubicon Gladiator and I thought 35" at first before I got the truck but after seeing it what's the point really since it's only 2" higher than the stock 33s. I was even considering 40" but I'd have to redo everything underneath and regear which I'm not sure I want to do. I was told mine came with a 1.5" lift kit, not sure if that was stock or an option?

 

[Renegade]

I have a 2021 Rubicon Gladiator and I thought 35" at first before I got the truck but after seeing it what's the point really since it's only 2" higher than the stock 33s. I was even considering 40" but I'd have to redo everything underneath and regear which I'm not sure I want to do. I was told mine came with a 1.5" lift kit, not sure if that was stock or an option?

The options are endless, and only you know what you want to do. 40’s will indeed require a significant investment in suspension and drivetrain modifications. 35s and 37s are fairly easy on a Rubicon.

 

[Deleted member 28696]

The options are endless, and only you know what you want to do. 40’s will indeed require a significant investment in suspension and drivetrain modifications. 35s and 37s are fairly easy on a Rubicon.

Thanks for the Response, I'm putting out feelers on what others have done and the issues they found, this way I will have a more informed decision on which way I'd want to go with this build, I'm new to jeep and modifications, I'm not a gearhead or mechanic. Did people need to lift it past the 1.5" lift that's already on the 2021 Rubicon Gladiator? If they didn't lift it at all did it rub? In what circumstances? If it rubs while turning with everyday driving that's not good. Did they need to regear it for 37" tires? I've heard that without regearing they may not get a 7th or 8th gear on the highway? What did they need to do to the stock Rubicon Gladiator to get 37"s to work? This might be the determining factor between 35, 37 or 40s. If I need to regear replace lots of parts for the 37"s to work I might as well go with 40s. I like the look of the 40's but not going to spend an additional $20K just on suspension, Axles and gearing. I'm reading that a 3.5" lift is kind of normal for 37" tires? but what is the minimum lift required for 37" tires to work, not rub, ready to rock crawl and be as functional as the 33" stock tires. I don't do allot of heavy duty off road stuff, but will occasionally go into the mountains and 4x4 to get photos of wildlife. Based on your comment I assume that's not the case with the 37" tires, I do know that I will have to recalibrate my tires for the speedometer to work. I may invest in the Tazer JL Mini. There's Tons of conflicting or inaccurate information out there for someone new to Jeep and Jeep Modifications.

 

[Renegade]

Thanks for the Response, I'm putting out feelers on what others have done and the issues they found, this way I will have a more informed decision on which way I'd want to go with this build, I'm new to jeep and modifications, I'm not a gearhead or mechanic. Did people need to lift it past the 1.5" lift that's already on the 2021 Rubicon Gladiator? If they didn't lift it at all did it rub? In what circumstances? If it rubs while turning with everyday driving that's not good. Did they need to regear it for 37" tires? I've heard that without regearing they may not get a 7th or 8th gear on the highway? What did they need to do to the stock Rubicon Gladiator to get 37"s to work? This might be the determining factor between 35, 37 or 40s. If I need to regear replace lots of parts for the 37"s to work I might as well go with 40s. I like the look of the 40's but not going to spend an additional $20K just on suspension, Axles and gearing. I'm reading that a 3.5" lift is kind of normal for 37" tires? but what is the minimum lift required for 37" tires to work, not rub, ready to rock crawl and be as functional as the 33" stock tires. I don't do allot of heavy duty off road stuff, but will occasionally go into the mountains and 4x4 to get photos of wildlife. Based on your comment I assume that's not the case with the 37" tires, I do know that I will have to recalibrate my tires for the speedometer to work. I may invest in the Tazer JL Mini. There's Tons of conflicting or inaccurate information out there for someone new to Jeep and Jeep Modifications.

That’s a lot of questions, and all your answers are somewhere on this site. Short version:
1. 35s work with stock Rubicon suspension, and stock Rubicon gears are fine.
2. 37s work with 2” suspension lift, but need wheel spacers or new wheels, and stock gearing is at its limit (beyond if in high altitude).
3. 40s require 3.5” or more lift, and deeper gears are a must.
4. Have fun!

 

[Jteakus]

I don't know how a 1.5'' can level a Rubicon. My diesel Rubicon is gonna need at least 2.5" and that was before the winch.

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