Beadlock wheels are designed to keep your tires from slipping off the wheel rim under extreme conditions. A beadlock wheel has two locking rings that sandwich the tire bead between them. The inner ring is bolted to the wheel and the outer ring is welded on. This setup clamps the tire bead down tight so it can't work its way off the rim even when aired down for rock crawling or under high loads from big horsepower race cars.