Another reason for non-concentrically seated beads is the position of the tire during the seating process. Some technicians will stand the tire up to seat the beads. This allows gravity to force the rim down so the tire is not centered. If the beads are seated while the tire is horizontal, gravity is taken out of the equation so the technician has a much better chance of centering the tire on the rim. This is particularly important when mounting tires for the steering axle since the slightest amount of variation in the rotating assembly can lead to irregular wear patterns that often lead to ride disturbances.
Finally, it’s crucial that the correct inflation pressure is used on every wheel position. The easy way is to just inflate everything to the maximum pressure molded on the sidewall. In most cases, however, that results in an overinflated tire.
TIA’s Fleet Tire OSHA Compliance Training Program covers the procedures for mounting and inflating tires so trucking companies can maximize the life of every tire, regardless of position. For more information, contact TIA’s director of training Chris Marnett at 800-876-8372, ext. 106 or firstname.lastname@example.org.
The Tire Industry Association (TIA) is an international association representing all segments of the tire industry, including those that manufacture, repair, recycle, sell, service or use new or retreaded tires, and also those suppliers or individuals who furnish equipment, material or services to the industry. TIA was formed by the July 2002 merger of the International Tire & Rubber Association (ITRA) and the Tire Association of North America (TANA). TIA’s main office is in Bowie, MD. It has more than 6,000 current members.