yan ba yung nakita ko before sa national geographic. may landcruiser na gamit sila dun pang trek sa snow, yung size cguro ng rim ay 16" or 15" ata yun, tpos yung gulong nya ay malaki din, tpos pag inflate na nila may spray sila na gas along side ng rim and then using a torch the gas would explode inside the tire creating pressure/air making the tire more enormous