Moved up to 37s, now have vibration?

[21WhiteRubi]

So here are the particulars on my Gladiator:

21 Rubicon, 3.6 auto
2.5" AEV DualSport Lift with Geo Correction Brackets
Yeti Steer Smarts HD Front Track Bar
AEV Borah Wheels

So I was running a set of BFG KM3s in a 315/70/17 size. While they were a little loud and cupped a bit (bought them used that way with 12k miles on them), they balanced out fine and rode nice and smooth.

Decided to finally move up to 37s and went with brand new Nitto Ridge Grapplers mounted to the same wheels. 37/12.50/17.

I now have a vibration from about 22-30 mph. Seems to lessen after that, but still a small vibration. Drives fine on the highway at 70mph, doesn't seem to increase, but haven't been over 70 yet.

Bought the Nittos through Discount Tire (same store I have gotten tires from many times in the past). Must have been the end of the day type job as they inflated the drivers side to 35 and the passenger side to 40 on the initial install. Reduced them all to 32 this morning, still have the vibration.

Took it back today and they rebalanced. Manager said he doesn't know who balanced them the day before but one was out 4 oz! Inflated them back to 35. Thought that would have done the trick. But nope, still have the vibration at about 22-30.

I will take them back to have them look at them again, but I hate being that guy, but I just know they aren't right. And I think it has to be tire/balancing related as the AEV suspension system is designed around 37s and my 35s were nice and smooth, and even a soft MT pattern! I know many here are running 37s without any issue.

Any suggestions, other than continuing to take them back to have them balanced?

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[Discount Tire]

@21WhiteRubi,

I apologize you are having some vibration issues. I would make an appointment with the Manager and go over the issues you are having along with the speed you are having a vibration.

We appreciate your support.

 

[21WhiteRubi]

@21WhiteRubi,

I apologize you are having some vibration issues. I would make an appointment with the Manager and go over the issues you are having along with the speed you are having a vibration.

We appreciate your support.

Thanks. Yes, I have been dealing with the manger. I will take it back up there tomorrow or Friday to see what they say. Have a 1700 mile one way trip to Moab coming up and would like a smooth ride to and from, lol. Discount is always helpful, hopefully we can get it figured out.

 

[SSinGA]

could just be a bad tire. My 38x12.5r17 Ridge Grapplers balanced out just fine at my local DT.

 

[terpsmandan]

Or you have a minor harmonic at that speed. My JK had a slight vibration from 50-60. I could always drive through it and at that speed, if started to feel like it would DW but never did. Hope they can find it but I just would not drive at that speed... On a side note, I am running 37" KO2's on Mopar wheels and I do not have any vibration. I was going to go with RG's but they I could not get them when the Jeep I ordered came in, so I went with the BFG's.

 

[Mac]

Do they have a Hunter Road Force machine? Most likely one of the tires is out of round and may need to be replaced.

 

[f33d]

Something’s off. I’m running 37 nittos and no vibrations. Vibrations are generally due to misbanlanced. I’ve run mine 30-40PSI.

 

[Jeeperjamie]

Sounds like the classic Nitto problems. The ridge grapplers are hit or miss. A set I bought when I had my JKU had 2 out of round tires. Plus they are way heavier than the BFG KO2S. Took a ton of weight to finally get the 2 tires to ride right. Never bought another set after that. People swear by them though, I'm not one of them

 

[Dougstdig]

Sounds like the classic Nitto problems. The ridge grapplers are hit or miss. A set I bought when I had my JKU had 2 out of round tires. Plus they are way heavier than the BFG KO2S. Took a ton of weight to finally get the 2 tires to ride right. Never bought another set after that. People swear by them though, I'm not one of them

Cooper

 

[Jeeperjamie]

Cooper

I'm running Kanati Trail Hogs right now and I'm really loving them. They got 19,000 miles on them and barely even look worn. Plus they ride great and are quiet and do great I'm the rain, snow, ice, and what little bit I've had them in the mud.

 

[sass JT]

Definitely sounds like a balance issue for sure… if I remember correctly, when I get my 37’s balanced at DT they have to static balance??? But I’ve only had one time that I had to go back due to vibrations…

on a side note… when you going to be in Moab sir???

 

[Trout Safari]

Totally normal. Your truck is just excited to be experiencing the big 37 for the first time. That shaking and quivering is called a Jeepgasm. But honestly, sounds like discount tire is already on it..

 

[21WhiteRubi]

Definitely sounds like a balance issue for sure… if I remember correctly, when I get my 37’s balanced at DT they have to static balance??? But I’ve only had one time that I had to go back due to vibrations…

on a side note… when you going to be in Moab sir???

Headed out the fourth of June

 

[sass JT]

Headed out the fourth of June

Awesome… my crew is gonna be there on may 18th… have fun sir!

 

[JeepOfTheseus]

Had my 37” KO2s rebalanced 3 mo ago just before Death Valley trip…getting vibrations again at 55-60. Not sure if it’s the nature of the beast or what.

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