The Ken Tool 31431 Tire Bead Expander fits tire diameters from ten to twenty two inches, making it suitable for a wide range of automotive and light truck applications. A pliable neoprene rubber tube is encased in a tough nylon cover, allowing the expander to slip easily over the tire. The construction resists oil, grease, solvents and acids for long lasting durability in demanding shop environments. By compressing the tread, the tool expands the bead to help seat it quickly and efficiently. Weighing approximately two pounds, the expander is easy to handle while providing reliable performance for technicians.