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Old 01-09-2014, 05:40 AM   #1
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Smoother shocks

Installed my teraflex leveling kit along with 285/75 km2s about 2 months ago. The ride is a little more rough but that was expected. I have heard that the 10th anniversary rubicon shocks are a little softer than stock. Was wondering if anyone was running em and if I would need longer ones since the leveling kit raised the front 2 inches and the back 1 inch. Or if there are better shocks than the 10th rubi ones? Thanks!

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Old 01-09-2014, 06:12 AM   #2
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Rubi shocks will be more firm and responsive. Overall better riding. For a aftermarket shock I recommend the Rancho 9000's

You don't need longer shocks w/ a leveling kit unless you want more travel.

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Old 01-09-2014, 06:37 AM   #3
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+1 on the Rancho 9000's. I've been running them for a few weeks and I am very happy with them. They are adjustable, so you can set them to however soft or firm you want them to be.
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Old 01-09-2014, 08:02 AM   #4
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Originally Posted by ZmN08 View Post
Installed my teraflex leveling kit along with 285/75 km2s about 2 months ago. The ride is a little more rough but that was expected. I have heard that the 10th anniversary rubicon shocks are a little softer than stock. Was wondering if anyone was running em and if I would need longer ones since the leveling kit raised the front 2 inches and the back 1 inch. Or if there are better shocks than the 10th rubi ones? Thanks!
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Old 01-09-2014, 10:27 AM   #5
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I like the ride that I am getting out of my 2013 Rubicon, obviously with their factory shocks.
This applies to both on highway, and off road.

Prior to this, I had a 2003 TJ with Rancho 5000's, lifted, but the ride was not that great!
I understand that the TJ, verses the Jk is not apples to apples, but I am just sharing my experience with you.

I am a old coot with a lot of aches and pains, so if the Rubicon shocks work for this old guy, then they should be great for you......
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Old 01-09-2014, 12:13 PM   #6
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What psi are you running? I did the same and the km's are e rated and are a lot harsher ride than stock tires
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Old 01-09-2014, 12:28 PM   #7
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What psi are you running? I did the same and the km's are e rated and are a lot harsher ride than stock tires
Good point. My 16's are E rated.
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Old 01-09-2014, 12:35 PM   #8
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RS9000XL's are a perfect fit for the JK. That being said I run our RS7000MT monotube. It is a firm/responsive monotube. Not as highly charged as other out there too.
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Old 01-09-2014, 02:00 PM   #9
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Yes, tire, rating, and PSI will have a definite impact on your ride quality, as well!
Accuracy of you tire gauge can also be a factor.
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Old 01-09-2014, 02:32 PM   #10
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Rancho 9000 and reduce tire pressure. Do a chalk test on your tires to find the optimum tire pressure for your application.
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Old 01-09-2014, 05:39 PM   #11
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What psi are you running? I did the same and the km's are e rated and are a lot harsher ride than stock tires
When I got em they were at least 80psi when I checked em and they literally blew my pressure gage apart.. I have em at about 50 right now.
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Old 01-09-2014, 05:50 PM   #12
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50 psi??? I've never run a tire over 35 and run my 35s at 28. Chalk test and Rancho 9000s will be your two best friends....
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Old 01-09-2014, 06:09 PM   #13
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50 psi??? I've never run a tire over 35 and run my 35s at 28. Chalk test and Rancho 9000s will be your two best friends....
Does it kill your gas mileage running em that low? I mean I didn't buy my jeep for good gas mileage just curious.
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Old 01-09-2014, 06:16 PM   #14
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Does it kill your gas mileage running em that low? I mean I didn't buy my jeep for good gas mileage just curious.
28 cold wont have much of an impact on your fuel economy unless you are running 50 psi now but i would bump it up to 32 to 35 for long highway drones
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Old 01-09-2014, 06:20 PM   #15
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28 cold wont have much of an impact on your fuel economy unless you are running 50 psi now but i would bump it up to 32 to 35 for long highway drones
Yea I got em at 50 right now. And I do drive 84 miles to work and back 4-5 days a week. And I'm getting 14mpg with 50psi. I'm thinkin I'll try 40 or 35 psi for a week and see how it goes
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Old 01-09-2014, 06:26 PM   #16
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RS9000XL's are a perfect fit for the JK. That being said I run our RS7000MT monotube. It is a firm/responsive monotube. Not as highly charged as other out there too.
Did someone say 7000's
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Old 01-09-2014, 06:28 PM   #17
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Chalk em. You are just going to wear down the center of your tires.
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Old 01-09-2014, 06:46 PM   #18
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Yep, you can either spend your money on rubber or gas. If you can get 1 MPG more rolling at 50psi than a more humane 30-35 psi, and that may be a big "if", then the numbers work out about the same.

I'm currently rolling my KM2s at 50psi for 5000 miles and I'm monitoring wear. I also ran a chalk test out of curiosity and the tire footprint is not as bad as I though it would be but it is obviously not optimum. Surprisingly, I got used to slightly knobby feel you get from the high tire pressure after about 500 miles and have never noticed it since then. I dropped down once to 32 psi after airing down and I felt the increased rolling resistance immediately.
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Old 01-09-2014, 06:53 PM   #19
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I would air down to at least 30 psi. I took my jeep in for a repair a couple of months ago and someone aired my tires up to 40 psi. I noticed right away. Much rougher ride. I run my 35's (Mickey Thompson Baja ATZ P3 D rated ) at 28 psi.
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Old 01-09-2014, 08:21 PM   #20
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Rancho 9000s for sure. You can adjust them as well.
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Old 01-09-2014, 08:22 PM   #21
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Yep, you can either spend your money on rubber or gas. If you can get 1 MPG more rolling at 50psi than a more humane 30-35 psi, and that may be a big "if", then the numbers work out about the same.

I'm currently rolling my KM2s at 50psi for 5000 miles and I'm monitoring wear. I also ran a chalk test out of curiosity and the tire footprint is not as bad as I though it would be but it is obviously not optimum. Surprisingly, I got used to slightly knobby feel you get from the high tire pressure after about 500 miles and have never noticed it since then. I dropped down once to 32 psi after airing down and I felt the increased rolling resistance immediately.
A rough ride is going to wear out other components...
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Old 01-09-2014, 08:42 PM   #22
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I am running the ranhco 9000's on my Jku. Love em.
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Old 01-09-2014, 09:36 PM   #23
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I think running 35s on a brick killed my gas mileage. At $250+ a tire, I find it more cost effective to maintain tires with proper rotation and inflation for longer life of tire than worry about 1 mpg more or less.
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Old 01-09-2014, 09:56 PM   #24
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I was running 37 when I first got my km's and they beat me to death so I started dropping 2 psi at a time cold till I ended up at 27 then bumped to 28 it's a much better ride on and off road .. Forget gas mileage it's never going to be good..
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Old 01-09-2014, 10:32 PM   #25
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Be careful airing down too low, especially for highway runs in hotter weather. Lower tire pressure causes significantly more heat build up in the tires and can cause catastrophic tire failure. This was determined to be one of the issues with the Firestone tires on the Ford Explorers several years back when the tires were delaminating. Softer ride was the reasoning behind Ford suggesting the lower tire pressures. 50 psi seems too high, but I would be wary of running anything below 30 psi cold. Keep in mind too, the heavier the load, the higher the tire pressure should be, so if you are hauling a lot of gear or made some heavy mods, this should be taken into consideration.
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Old 01-10-2014, 01:57 PM   #26
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Thanks guys. Got em at 45 for now. They were actually at 60 so evidently the psi gauge I originally used wasn't correct. And sounds like the rancho 9000 are the way to go.
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Old 01-10-2014, 02:35 PM   #27
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Stop guessing and chalk test your tires. 45 is still WAY too high. DO NOT GO BY WHAT IT SAYS ON THE SIDEWALL FOR PSI. Was that clear enough? Stock Wrangler tires are in the mid-30's. Don't believe me? Look at the sticker on the edge of your door. Now do what everyone has been telling you and chalk test your tires. Google "tire chalk test" and you will get step by step instructions. What you are doing now will not only wear out your tires faster, but is actually very dangerous.
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Old 01-10-2014, 02:59 PM   #28
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Stop guessing and chalk test your tires. 45 is still WAY too high. DO NOT GO BY WHAT IT SAYS ON THE SIDEWALL FOR PSI. Was that clear enough? Stock Wrangler tires are in the mid-30's. Don't believe me? Look at the sticker on the edge of your door. Now do what everyone has been telling you and chalk test your tires. Google "tire chalk test" and you will get step by step instructions. What you are doing now will not only wear out your tires faster, but is actually very dangerous.
X2 listen to other people. 45psi is still way too high. Drop your tires down to 27-30psi which is free unlike spending over 300 dollars on new shocks which still won't solve your issue that your tires are way overinflated. Take advice and try it!
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Old 01-10-2014, 03:54 PM   #29
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X2 listen to other people. 45psi is still way too high. Drop your tires down to 27-30psi which is free unlike spending over 300 dollars on new shocks which still won't solve your issue that your tires are way overinflated. Take advice and try it!
Lets get real or at least attempt some semblance of reality. Max tire pressure is 100% dependent on the tire model and size. 45 psi may be a lot for some tires and not enough for others. Case in point, my KM2s have a max load rating at 80 PSI (printed right on the tire and in BFG specs) and the Jeep operational spec on the door is 43 psi. The same model tire in a different size has a max loading rating at 35 psi. Check your specific tire specs.



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A rough ride is going to wear out other components...
I agree and I did think about that but the ride and the handling are not bad. I considered wear, particularly components in my neck and lower back.

Passengers have never complained. I tried the same thing on my 09 with 37s and I got immediate feedback so I backed off.

The KM2s are not known for stiff sidewalls. That might be the difference.

I consistently get 18+ MPG at 75 MPH based on the EVIC. I don't trust its calculations on a tank full but for short term readings after a reset it seems the values make sense. I am not as lucky as many who get this type of mileage regularly. I was never able to reach 18 before on either of my JKs.
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Old 01-10-2014, 04:08 PM   #30
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OP, are you KM2's E rated? Maybe I missed that part. If they are, expect to go down below 30 psi before you get an acceptable ride. Im at 27 psi and I still hate life with e-rated tires. My mpg hasn't changed much, less than 1mpg. I use the built-in mpg gauge since my daily route never changes.

Remember something very very important: One of the first things to die on your jeep will be your ball joints. Their life span relies heavily on tire firmness. Since the ball joints are located between the tire and the shock, softening the shock will not help this at all. Your ball joint life span depends directly on your tire firmness (and tire size, etc). So don't be shy to air down and waste some gas to save your ball joints. You might save more money in the end.

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