If you are talking about loosing air, it is a common problem on quads. I ride utility quads and love to rock crawl so I abuse my tires and wheels. The beads get packed with dirt,sand and rocks. I have had to take them off the wheels and use a chore-boy to clean the wheels at the beads.
You might what to air up higher like you would to seat the bead and put some water on the bead area to check for leaks.
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