Welcome to TBN and congrats on the new tractor. Remember what your mother said about making faces - it also applies to smiles. I'm also looking for a rotary cutter and definitely 5 foot. I have absolutely no concerns on whether or not the thing will cover my rear tires. Since my rear tire width is 80 inches, only a 7' would really cover. I'm more concerned about maneuverability and going in, around and about the trees. Be very careful and enjoy.