I've always been told that the Extremes were better if you were planning on running across any hard pack or asphalt (like in Oklahoma), but to drop the paddle count by one. For example, and 8 paddle Hauler would be closely equivalent to a 7 paddle Extreme. My brother ran 20x10-10 8-paddle Extremes on his 85 ATC for years and loved them, but they are a bit much paddle for my stock-engine TRX if the sand gets damp. I know the Extreme paddles are far less prone to rolling over.