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Hey guys I just bought a 2012 4 door jk with manual transmission. The question I have is I'm about to buy 315 75 16 duratracs with mb72 wheels what problems if any will I have? I have a 2.5 teraflex kit coming my way. Will gearing be an issue,mpg so on. Thanks in advance for the help.
 

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2020 Jeep Gladiator
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You should be good with the 2.5" lift with those tires. If you do any crazy flexing you may get some fender flare rub but you can trim or replace your fenders to prevent that.
Your MPG will surely go down but I have no idea how much. As far as gearing, that depends on what you have now. I'm running with 4:10 gears in an old '07 and the 3.8L engine. You have the 3.6L engine with more torque so if you are running anything close to 4:10s you will be fine.
Here are a couple of gear threads:
http://www.wranglerforum.com/f33/is-3-21-gear-that-bad-190693.html
http://www.wranglerforum.com/f33/3-6-vs-3-8-gear-charts-173271.html
 
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