The weight is only half the equation... The extra diameter is putting more of a load the drive train than a tire of the stock size that weighs several lbs more. what happens when your struggle to break a big nut or bolt loose? you grab a longer bar!.. Same effect on a tire... Don't get me wrong, it looks killer, but what are the effects gonna be when you get it into the mud?. Something is gonna give prematurely unless the machine is way over built, and I doubt that being were seeing all these clutch problems.
Again, it looks awesome, I'm just pointing out the technical aspects of the deal..
Myron