Two sets can be pricy but if you can afford it, best option! Mud and sand the D606 if you have to be DOT on the rear is a long lasting tire. I run Trials because the sand is not a big issue but mud sucks bad. Get about 1400 + miles on the Trials and the D606 will give you a little more and they work well. If you don't need DOT, the options are endless and you can buy any inexpensive tire a run like hell. If you do go two sets, I ran Bat-16 on my Sumo 17" F/R and loved that tire in all conditions.