ATV tire bead leak: causes and sealing
A slow air loss at the wheel rim can be frustrating on an ATV because the low-pressure tire depends on a clean, concentric seal between rubber and metal. The leak often appears as fine bubbles at the sidewall lip after soapy water is applied. In many cases the tire is still structurally sound, and the problem is contamination, corrosion, rough mounting, or incomplete bead contact after installation. Resealing is usually possible without replacing the casing when the rim edge and tire toe are prepared correctly.
Direct answer
When an ATV tire is leaking at the bead, the most common cause is a poor seal where the rubber toe meets the rim flange. Dirt, corrosion, old rubber residue, a small cut in the bead area, or a tire that was not fully seated can create a slow leak. Cleaning both surfaces and applying an ATV tire bead sealer is the usual first fix. If the leak continues, the tire should be broken down and inspected for rim damage or a torn bead toe.
Some bead sealer products remain slightly tacky and fill minor voids while the tire is inflating. They work best when the rim bead seat is clean, dry, and free of heavy pitting. A sealer is not a permanent repair for a bent wheel or a damaged tire casing. For a leaking tire, the practical order is to locate the leak, unseat the bead, clean the contact area, apply sealer if needed, and reseat the tire fully.