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Discussion Starter #1
On Monday, went to Discount Tire and got new KO2, 285/70/17. Drove off, and loved the ride, smooth for a day.

We are in the middle of a deep freeze with insane wind chills/snow.. and the jeep sat out in it for about 7 hours. Last night, I leave work and notice a consistent wobble, or gallop feel to the jeep at any speed. Took it back and one guy said the weights were placed too far away, another said one of the weights was loose.

But as I drove it, it's still there. I did notice with the cold, the tire pressure dropped about 5 psi. Instead of 37 it was 31-33. Not sure what's going on...but it's not riding smooth like it initially did.
 

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that is normal with a frozen tire. They get a flat spot and takes many miles to warm up enough to smooth out. when it warms up things will be normal
 
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that is normal with a frozen tire. They get a flat spot and takes many miles to warm up enough to smooth out. when it warms up things will be normal
Really, I have never heard that. If that's what happened, it's a big relief.. I drove about 20 miles to DT and it still rode bad. Then after they rebalanced them, drove back the 20 miles and it was same. Do you think it's permanent?
 

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Probably not. You just need to get them warmed up. It is normal to see a tier loose pressure with temperature change. Rule of thumb is 1 pound pressure change per 10 degf.
 

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Really, I have never heard that. If that's what happened, it's a big relief.. I drove about 20 miles to DT and it still rode bad. Then after they rebalanced them, drove back the 20 miles and it was same. Do you think it's permanent?
I have lived in a cold weather state for 60 years and have been driving for 48 years and it is common. think about what tires are made out of. If you are in a deep freeze go find a rubber garden hose and see how easy it is to coil up or uncoil. pavement is cold tires are cold takes a long time to warm a tire up.
 
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As stated above, totally normal.
I got a tractor out yesterday to clear some snow drifts after a couple days of highs in the -11 to -15f temps. We had a low of -29 with -60 wind chills. The tractor was inside but not heated space. I went down the road to clear my neighbors drive for him and it was like driving one of those Shriner cars in the parade.
 

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As stated above, totally normal.

I got a tractor out yesterday to clear some snow drifts after a couple days of highs in the -11 to -15f temps. We had a low of -29 with -60 wind chills. The tractor was inside but not heated space. I went down the road to clear my neighbors drive for him and it was like driving one of those Shriner cars in the parade.


Wow Glad I live in the south and will stop complaining it was 21 at the bus stop Wednesday morning.

You will love the KO2s once they thaw out. My 2017 came with 265/70/17s. Just wish they would wear out faster so I can get 285/70s or 285/75s.


Sent from my iPhone using Tapatalk
 

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Okay, ...it makes sense, but my last TJ I had the KO2s and we had same frigid winters, as cold or colder. I remember one night, at work, my battery died and the wind chill -45, battery died, didn't get out of there till aftel midnight. So it sat for twice as long and in colder temps.

Heck my other two TJ's, or vehicles never did it. .. If this is the case, then all the cars sitting on lots would do it. Owned many cars and never had it happen.
 

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With the light weight of the Jeep, I keep my tire pressure down to about 28 PSI +/-.
My 30" Grabber AT2s would flutter or bounce a little when it was cold, and my 33" KO2s do it now. And the longer they sat parked between trips, the more I felt the bumps.
Eventually they would warm up, and "fly right". If yours don't eventually even out, maybe one or more of your tires may be defective or just "out of round" where it's hard to properly balance.
There have been reports of KO2s that won't balance. Google-fu: https://www.google.com/search?q=bf+goodrich+ko2+balancing+issues&rlz=1C1CHBF_enUS790US790&oq=bf&aqs=chrome.1.69i57j35i39j69i60l3j35i39.2427j0j7&sourceid=chrome&ie=UTF-8
 
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Discussion Starter #10
With the light weight of the Jeep, I keep my tire pressure down to about 28 PSI +/-.
My 30" Grabber AT2s would flutter or bounce a little when it was cold, and my 33" KO2s do it now. And the longer they sat parked between trips, the more I felt the bumps.
Eventually they would warm up, and "fly right". If yours don't eventually even out, maybe one or more of your tires may be defective or just "out of round" where it's hard to properly balance.
There have been reports of KO2s that won't balance. Google-fu: https://www.google.com/search?q=bf+goodrich+ko2+balancing+issues&rlz=1C1CHBF_enUS790US790&oq=bf&aqs=chrome.1.69i57j35i39j69i60l3j35i39.2427j0j7&sourceid=chrome&ie=UTF-8
I don't think it's out of round, because when I first got the tires, it drove great. The next day is when the cold spell hit and Jeep sat out all day getting blasted with snow/ice/wind -20 winds. When I got in to drive home is when I got the thump...thump.....thump. ..

So what everyone is saying makes sense. Tho' after I noticed the thumps, I took it back in and they rebalanced and told me the magnets were too far apart in one of the tires, and another guy said one of the magnets didn't stick. I got two different explanations...So they fixed that but the Jeep drove the same....

Tomorrow it might get to 40's, I'll see how it goes. I think it should be okay. Seems such a coincidence that it started right then.
 

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I've actually gotten the " cold tire bounce" in my old Suzuki here in AZ when it was <40* outside.
Damn thing was so light and riding on very stiff General Grabber Red Letters, the tires would take 5-6 miles to warm up enough to smooth out.


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Discussion Starter #12
The galloping drive is gone, you guys were right about that. Now I'm dealing with it pulling to the right though. Some say that's the nature of aggressive tires, tho' I went from Mts to ATs and only up one size (33") so I don't see why it'd do that.
 

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The galloping drive is gone, you guys were right about that. Now I'm dealing with it pulling to the right though. Some say that's the nature of aggressive tires, tho' I went from Mts to ATs and only up one size (33") so I don't see why it'd do that.
It shouldn't.
Btw, are you running that size with stock suspension? Spacers? Any clearance issues?
 
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