I'm not sure I'd switch to a Mud Bug from 589's if the 589s still had life in em. If you are just bored with the 589's or need to replace your tires, the Mud Bug is a great choice. The set that was pictured on my old Grizzly in this review are still hittin it hard and they don't have an easy life.
I still stand behind my review on the Mud Bugs and if anything, have grown to be a solid fan of that tire. As for the Mud Bug R's. I don't know squat. I know I don't like the way they look.
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