They seem to last twice as long as stock was doing some spring riding last year on way up (groomed trail) stoped for break my buddys nytro with stock sliedrs had melted to his track from over heat we had to pry them loose mine were barley warm will never go back ......
I got six seasons on the stock sliders on my '06 900 and they still had 70% left. Just wrapping up season three on my '12 Pro and sliders look like new. I am very anal about using my scratchers though. For me, hiperfax are not needed.