yeah it will fit. Alot of guys around here running 16's on the RMK's.
You will notice it takes a little more pressure to tip it over, but not much more.
If you figure a 144" x 15" has maybe 40% actually on the ground at any one time thats about 6 square feet of traction....and going to 16" wide under the same equation gives you 6.4 square ft. Comes out to about 7% more on the ground....A little more actually than going to a stock 151"
From what I hear you just make dam sure she is aligned rite because it doesnt leave much clearance on either side and could rub.
