I have the Blackwaters on my RZR S with no issues. The sidewalls are so stout it feels like it has power steering with 8 lbs in the front tires, even with the snow plow weight on it. I also have an XP 900 with Roctanes (8 ply also) but they leak air on the same beadlocks and the Blackwaters are mounted on. When they get down to low pressure, the sidewalls stick out a lot. Rocktanes are great on traction though.