Join Date: Feb 2014
Location: Haddonfield, NJ
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Not sure what that means to you, as the definition is very subjective, but assuming you mean you'll fully stuff the tires into the fender well, you'll get some rub with 285s, and definitely rub with 305s
Some prefer not to have spacers for really aggressive off-roading - do you have any other mods? Stock shocks? connected sway bars? Rocker guards? Those will be rate-limiting factors, too.
Search the forums for "what fits" and you'll find a very exhaustive list of sizes and tricks to mitigate interference.
2018 Jeep Grand Cherokee Trailhawk