The rim is the outer edge of a wheel that holds the tire. The condition of the rim directly impacts how well a tire will hold its inflation. For the bead to form an air-tight seal properly, a clean, smooth rim surface is essential.
To condition the rim prior to mounting, use a wire brush to remove any dirt, grime or debris from the rim area. The wire brush can be used to rough the bead gently of the tire before mounting to help ensure a better seal.
Once the rim is cleaned and ready, the technician can apply a lubricant designed for rubber to the bead area. The right type of “tire-use-approved” lubricant here is important because those designed for other applications may create future issues –- especially if they allow the tire to slip on the rim.
Ingredients in non-approved lubricants may react with the rubber and damage the bead, causing tire failure. Be sure to use quality products designed for the intended application.
After lubricating the rim, the same lubricant should be applied to the entire bead area of the tire, from the edge of the innerliner to the molded ribs on the lower sidewall. You need complete coverage here, but be careful not to get extra inside the tire, as it can lead to rim corrosion over time.