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 inflate everything to the maximum pressure molded on the sidewall. In most cases, however, that results in an overinflated tire. ET
This article was provided by the Tire Industry Association (TIA), 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.
The TIA’s Fleet Tire OSHA Compliance Training Program covers the procedures for mounting and inflating tires. For more information, contact Chris Marnett, TIA’s director of training, at (800) 876-8372, ext. 106 or firstname.lastname@example.org.