Break Failure on Rental

We rented a polaris rzr 1000 from a small shop in CO. We drove it up a mountain and it took about 20 mins. Stopped for about 15 mins at the summit and then started to drive down. About 10-15 mins into going down the mountain, we came around a turn to a straightaway and the breaks wouldn't engage and we couldn't slow down. We had to avoid a car and a motorbike so we swerved to the side up the mountain rocks, came back down to the dirt road and flipped. It turned out to the best thing because otherwise I don't think we could have stopped and we all got out okay.

The reason I'm posting here is because I don't have any technical understanding of what could have happened to make the breaks fail that quickly. The rental owner claims that he doesn't doubt that the breaks were not working when we crashed, but he says that they overheated and therefore we are liable. It seems ridiculous on our end considering how close we were to falling off the side of the mountain.

Would appreciate any input or advice. Thank you

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howdy ya'll, joined this forum last month before i bought my sportsman, ya'll been real helpful, hope someday i can give as good of advice as ya'll,
Thanks

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Hi guys! new here, so just a quick question, I am buying a 2014 Sportsman 570 with EPS and will be needing to install a plow before winter. So my question is what are you recommendations for a plow that will be easy to use and withstand the winters on Michigan. I will be adding a winch for the plow. Is the Polaris Glacier system the best or is there something else better out there? Thanks in advance! Dave

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