285/70/17
JK Newbie
Joined: Aug 2011
Posts: 34
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From: Heber City, UT
I just put these 285/70/17 KO2s on last week. Spec sheet says they should be 32.7 inch diameter compared with the stock 255/70/17 MTs spec at 32 inches. I measured the new tires (on the Jeep) at 32.0 and the originals (on an off-road trailer I have) at 31.5. I really like the new tires. Very smooth on the road, good snow/ice traction. The MTs had worn unevenly (rotated several times in 21000 miles) and vibrated, rough ride. Last time balanced one needed six ounces of weights. These tires haven't been off-road yet but I don't have any tire rubs or anything. GPS speed seems to agree with speedometer.
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JK Newbie
Joined: Mar 2015
Posts: 64
Likes: 0
I just put these 285/70/17 KO2s on last week. Spec sheet says they should be 32.7 inch diameter compared with the stock 255/70/17 MTs spec at 32 inches. I measured the new tires (on the Jeep) at 32.0 and the originals (on an off-road trailer I have) at 31.5. I really like the new tires. Very smooth on the road, good snow/ice traction. The MTs had worn unevenly (rotated several times in 21000 miles) and vibrated, rough ride. Last time balanced one needed six ounces of weights. These tires haven't been off-road yet but I don't have any tire rubs or anything. GPS speed seems to agree with speedometer. <img src="https://www.jk-forum.com/forums/attachment.php?attachmentid=666246"/><img src="https://www.jk-forum.com/forums/attachment.php?attachmentid=666247"/><img src="https://www.jk-forum.com/forums/attachment.php?attachmentid=666248"/>
JK Enthusiast
Joined: Mar 2012
Posts: 303
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From: Webster, NY
I have 285/75R17 currently on stock suspension until the spring. I did have to go with new wheels to prevent rubbing on road, however off road I get into the fenders pretty good. Setup is Toyo AT2 Extreme w/ 17x9 Vision Soft 8 (4.5 backspacing).
JK Enthusiast
Joined: Jun 2015
Posts: 303
Likes: 1
From: Blue Bell, PA
haven't done so yet but I will be going with the new Nitto Ridge Grapple 285/70/17, spring leveling kit and then cutting the stock fenders to open up for wheel travel if I ever need it. The Ntto's are spec'd at 33.3" and not super wide so I think I can get away without spacers or new wheels, thats the hope anyway.
JK Newbie
Joined: Aug 2011
Posts: 34
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From: Heber City, UT
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JK Newbie
Joined: Mar 2015
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JK Junkie
Joined: Nov 2011
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From: Over the hill
What I did was put a small washer under each steering stop bolt to keep 285/70-17 tires from rubbing at full turn. The amount it changes the turn radius is negligible -- And since it reduces the steering angle slightly, it's potentially easier on the front axle u-joints.
Last edited by Mr.T; Feb 16, 2017 at 10:11 PM.