Got a 2006 660 Yamaha Rhino Long Travel, bought the unit used with Gorilla Axles, within a year both rear axles broke. Thought I would try the Axles from Super ATV because they were cheaper. I am very satisfied so far with them and they are a thicker and stronger axle. After measuring the diameter, its 1/8" thicker than Gorilla. My vote is Super ATV, cheaper, stronger and got the axle within 24hrs of ordering. Very impressed. Anyone else have opinions on which axle is the way to go?????