Jeep Commander Tire Sizes?

I have a 2007 Jeep Commander Overland with a stock tire size of 245/60R/18 and I was wondering if I could put a set of General Tire Grabber AT2 tires in the closest size which is, 255/60R18 Without having any rubbing issues? Are there any other All Terrain tires with my size tire or one close to that? I do some light offroading on the beach so I really want something All Terrain.