Ken-Tool bead expanders fit most bias ply tubeless tires. A pliable neoprene rubber tube is encased in a tough, long-lasting nylon cover. Expanders slip easily over tire and withstand contact with oil, grease, solvents, and acids. Expands bead by compressing tread to seat beads. All models feature an over-pressure relief valve and external pressure quick release valve for safe operation.