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My P1000-5 has 8 ply Tusk 28” Terrabites and Tusk beadlocks, usually set at 12# f & 15# r and carry identical spare with tools and lots of gear, riding NV & AZ desert + Utah & CO mountains. If we expect a day of extreme rocks I’ll bump up the psi a bit. 3rd year now, about 3k miles with only 1 slow leak from cactus (barrel?) thorn In between tread knobs. Rotate all 5 periodically, minimal wear, not much tread rock damage, ordinarily don’t drive like I would in a sport machine. Have riding buddies with razors and talon. I check air pressure before I ride, tires typically hold psi for a month or more, depending on ambient temperature naturally. Keep this utv in heated/cooled garage.What psi do you have them at? Got done mounting mine on the Tusks tonight. Going to leave them at 18 overnight and check in the morning that they're still there. I'll bring them down tomorrow after getting them on the machine.