Ken-Tool's T131 Utility Tire Pneumatic Bead Expander, No. 31431, makes it easier for 10" to 22" diameter utility tires to seat on the rim. The tool weighs only 2 lbs and uses an internal heavy duty neoprene rubber tube featuring an internal over-pressure relief valve that protects the expander from accidental over inflation. It also features an external pressure quick release valve and is covered by a tough, abrasion-resistant nylon sock. Resistant to oil, grease, solvents, acids and many other chemicals found in tire and tractor shops. Designed for shop air pressures up to 150 psi.