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The Book of MOPAR says 5% variation is acceptable from stock size - the 245 defenders calculate to 4.2% increase and I've run a set now 70k miles, there was some scrub on the OEM mudflaps up front near full turn angle with zero damage and the rear axle with its huge weight load capacity simply goes up and down so a tight fit does not interfere.

With a taller sidewall inflation pressure would be higher to keep a 'jello' side-to-side wiggle from being a nuisance - I found the narrow stock steel rims and the fatter Michelins 245's will let chassis quiver at stock pressures.

I'm interested in 235's - a favorite rural snow allowance to keep footprints narrow but help reduce plowing snow vs riding above it....
 
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