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Old 10-17-2015, 10:47 PM
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Newbie 2016 JKU Owner with new wheels and tires question...

Hey folks! I purchased my my first Jeep last Friday (Oct. 9, 2015). It's a new 2016 Jeep Wrangler Unlimited. When working out the deal on the new Jeep I went ahead and placed an order for 5 new wheels and tires. They were BFG KO2, 285/70R17 on Fuel Octanes (D509 Matte Blacks). They were installed this past Friday.
Over the course of the first week and several hundred miles, I got used to the factory P255/75R17 OWL On/Off-Road Tires on 17-Inch x 7.5-Inch Aluminum Wheels as I "patiently" waited for the day to head back to the dealership and get the my new wheels and tires.
Two questions are coming below. Sorry, I like to tell a short story first.
Everything seemed fine coming home with the new shoes on the Jeep Friday afternoon minus the initial bumpy I540 that runs from the dealership on my way home.
However, today the Jeep felt a little floaty at times. I'm definitely taking it back out again tomorrow on a country stretch to see if I get the same effect because there was some patchy wind today, but it was only 5 to 10 mph. Question 1: Can a calm wind such as that make the Jeep feel this way?
I've seen some posts about floaty steering on the forums (castor, steering box, steering stabilizer, etc), but most of these guys and gals are getting lifts and much bigger tires.
So my second question, for you all who are familiar with the handling characteristics and steering components. With the new wheels and tires that I purchased, should there have been any adjustments made to the steering components?
I ran the numbers based on tire sizes and my biggest difference is definitely width....
https://www.tacomaworld.com/tirecalc...5r17-285-70r17

Just a newbie here looking for any suggestions, should I notice the same effect tomorrow. If I need to call the dealership/service department where the Jeep was purchased and the new tires were installed, I don't want to sound like a TOTAL newbie.

Thanks folks!

Before and after pics are below as well. One of my favorite colors happens to be black btw.

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craftmath is offline   Quote
Old 10-18-2015, 07:19 AM   #2
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Congrats on the new Jeep !

I would first check the tire pressure. For 285's you don't need to be up at 35+ psi like the stock tires. Somewhere around 30-32 psi. Little more little less.

You should not have to do any adjustments to the Jeep. Perhaps the new tires and wheels aren't balanced correctly.

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Old 10-18-2015, 02:34 PM
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Originally Posted by stillcrazyman View Post
Congrats on the new Jeep !

I would first check the tire pressure. For 285's you don't need to be up at 35+ psi like the stock tires. Somewhere around 30-32 psi. Little more little less.

You should not have to do any adjustments to the Jeep. Perhaps the new tires and wheels aren't balanced correctly.
Thanks stillcrazyman. I checked the tire pressure, cold, first thing this morning. It got down into the upper 30s in eastern NC last night. The pressure for each tire was 35 psi when I checked before driving off. Knocked them down a little to your spec.

After driving at various speeds from 45mph to 80mph in a light breeze this morning, I think everything is fine. Though these tires aren't huge, there is quite a bit of extra weight at each wheel and tire versus the stock setup (at least 20 pounds according to some specs I've seen). This extra weight is probably what contributes to the effect I'm feeling. Of course it isn't going to drive exactly the same as the stock setup highway tires!

Thanks again for chiming in.
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Old 10-18-2015, 03:59 PM   #4
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You're welcome ! I'm new to all this Jeep stuff too, so what I relate is the experience of others.

Enjoy that Jeep !
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