My personal thought is that Keystone just found a cheaper Supplier to replace the Marathons. Again, just my personal opinion.
Our SOB MFR originally used Marathons, but lots of problems (heavier than Monties), so 614s became the OEM, now they've switched to Westlake (Chinese made Gs) tires. I Googled them and followed the trail to the Parent Company and read pages of info on problems with their tires. So, guess you just can't win without changing to something better yourself.
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Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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