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Old 03-20-2016, 11:10 AM
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Cooper Discoverer A/T 3 275/70/17 initial impression

Tire replacement time on my 09 Rubicon. I over analyzing and lots of research, I decided to go with Cooper A/T3. I went with the 275/70/17 because I wasn't looking at adding a lift at this time and wanted to keep stock height. Also had the wheels painted while they were off. Cooper's website says that they are 32.4 inches tall. However when inflated on the Jeep they measure 31.5" Seem to be quiet so far, much quieter than the OEM BFG's. Will post more as I get them into the mud.

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Old 03-22-2016, 11:38 AM
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Fuel economy dropped a bit from 19-20 mpg indicated on the EVIC to 17-18 for half of the first tank of gas. The ride is much better and quieter than the stock BFG M/T tires.

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Old 04-11-2016, 03:33 PM
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Update: They are nice and quieter than the BFG's. Mileage in the low 18's and they pack up with wet mud really fast. I centered on that mound of mud and had to to be pulled out.
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Old 04-22-2016, 05:57 AM   #4
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Fuel economy dropped a bit from 19-20 mpg indicated on the EVIC to 17-18 for half of the first tank of gas. The ride is much better and quieter than the stock BFG M/T tires.
Any rubbing with the stock wheels and extra inch of width?
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Old 04-22-2016, 10:23 AM
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A little when I back out at full right lock. That's it. Not planning to mod the steering stops because of it.
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Old 09-14-2016, 11:05 AM
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Update: Had them rotated and balanced after 12000 miles and they do not like being turned around. MPG went down to high 16's for two tanks of gas. Now back into the mid 18's again.

They handle the mud well as long as nothing is touching the frame. Overall very happy. Wish they made a 275/75/17.
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Old 09-29-2016, 10:53 AM   #7
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A little when I back out at full right lock. That's it. Not planning to mod the steering stops because of it.
What do they rub on? Thanks
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Old 09-29-2016, 03:22 PM
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Control arm. Next add is 1.5" wheel spacers.
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Old 10-02-2016, 08:22 AM   #9
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Update: Had them rotated and balanced after 12000 miles and they do not like being turned around. MPG went down to high 16's for two tanks of gas. Now back into the mid 18's again.

They handle the mud well as long as nothing is touching the frame. Overall very happy. Wish they made a 275/75/17.
Those really need to be rotated more frequently than every 12000 miles.

Mine sucked in the mud. Decent street tire for the cost but not very good off road IMHO.
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Old 10-03-2016, 06:33 PM
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Only problem I have had so far in the mud has been ground clearance.

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