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Old 02-27-2014, 07:32 PM   #1
silversgrfx's Avatar
Join Date: Jan 2014
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New 33" tires and trying to reduce the vibrations

Been making some upgrades and modes to my JKU. Last night had GY Duratracs 285/70r/17's putt on.

This is my first experience with a) larger tires and b) all terrain tires. The previous Stock SR-A's of course rode very smooth on highways. Firstthing I noticed when I was driving home and got on the interstate is once I was hitting highway speeds (50mph+) there was a very noticeable vibration. I would compare it to driving on a unpaved road or one of those massaging beds you find at seedy hotels.

I wondered if perhaps the balance was off or they didn't put back in my hub centric rings for the wheels. Fist thing today was getting on and research here. Of course the Goodyear tire place inflated to 38 psi. Reading other post related to my issue somewhat I see it is recommended to air out. I have aired out to 30-32 psi (not a cold reading). While it seems to have softened the vibration at the high ways speeds it's still there.

My question as a person new to larger All-terrain tires is the rough vibrating ride at highway speeds the norm for such tires if your psi is at the "recommended" inflation/psi designation (38-40 psi)?

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Old 02-27-2014, 08:54 PM   #2
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Location: Rosharon, Tx.
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Im taking the were balanced, but some times they don't do a good job. High quality shocks will also help. Not old high quality shocks.

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Old 02-28-2014, 09:31 AM   #3
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They were put on by a Goodyear facility so yeah they were balanced. Looking at the back wheels the back passenger tire has a ton of weights added compared the the back driver. Didn't look up front yet. But when I drive at lower speeds i can feel a bounce to the driving that becomes a heavy vibration when accelerating up highway speeds then its just a steady consistent strong vibration. While I tried airing down to a cold reading of 28 psi in my tires it improved but still persists.

I called the Goodyear place and am taking it back today to get the balance re-checked. I feel the vibration is not normal as having ridden in other jeeps with larger Mud Tires on and the ride was smoother.

My only guess is
1) the balance isn't right

2) they didn't put my hub centric rings back onto my wheels to keep them centered or

3) defective tire.

Will see what they say when I take it back.
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Old 02-28-2014, 04:09 PM   #4
Join Date: Feb 2014
Location: Manassas, VA
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I am assuming when you say vibration that the steering wheel is shaking.

At that speed, that would be a tire/balance issue. The amount of air in the tires or shocks would not cause that.

Are the tires new or used?

If the goodyear is unable to balance the tires find a store that has a Road Force balancer.
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Old 03-02-2014, 07:47 PM   #5
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Took my jeep back to have the balance rechecked. The guy who did wasn't in so another tech checked and rebalanced them using static balance. The first guy jacked it up. Too much weight was used, along placing the weights in the wrong area of the wheel. The second tech that redid it got it balanced drove nice and smooth. I aired up the tires today to 37 psi to see how it felt and was still was pretty smooth. Now I'll do a chalk test and see where I get the most even wear.
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