Ok so the next size up is a 245/70 which is the same width as your current tires but a hair taller. If you want to go bigger I'd install a lift and then go from there.
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2007 4.7 Liter XK | OME HD Suspension Lift | Matt's 1/2 Inch Rear Lift Spacers | Jeepin by AL HD UCA's | Rusty's Rear Adjustable Track Bar | JKS Rear Sway Bar Quick Disconnects | Black Rock Series 997 Wheels | Fred Goeske .25 inch hub/wheel Centric Spacers | 285/70R17 Goodyear Wrangler MT/R's w/Kevlar | Air Flow Snorkel | Flowmaster 50 Series SUV Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Powertrax No-Slip | 4.7 L Badge | 20% Tint
I literally just put new tires on mine today. Destination T/A's. I have no lift so it's the standard 245/65/17's but I think they look great. I was worried that they'd be too chunky on the road and create a lot of noise but so far I haven't noticed much of a difference over the stock Fortera's. They have a nice knob to them so they should be fine for moderate off roading.
I'd say check 'em out if you want to stay stock. (Firestone got me out the door with lifetime alignment and rotation for $712... it's "super saver Sunday" at Sear's Firestone).
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