Issue link: https://read.dmtmag.com/i/34500
MISMOUNT Mismount occurs when the tire beads do not seat fully on the tapered rim flange area of the wheel. As can be seen in this diagram, one of the tire beads has fully seated against the rim flange. But in another small area the bead did not “climb” completely up the tapered area of the wheel. In this area the bead is tucked further under the rim making the sidewall slightly shorter. If the tire continues to run, it will develop “maxi-mini” wear, which is characterized by the tread depth on one side of the tire being deeper than on the other side. In this case, balancing will only be a “band-aid.” In other words, the tire may be balanced for a few thousand miles, but as the tire wears, the weights would have to magically shift to another part of the tire/wheel assembly in order to maintain proper balance. Because they don’t magically shift to other locations, the driver usually comes back after a few thousand miles saying “whatever you did, it worked for a little while, but now the vibration has come back.” If the tire mismount is not detected immediately, the tire may develop localized shoulder wear. Eventually the tire wear pattern will appear around the rest of the shoulder, sometimes resulting in a noticeable ride disturbance. Mismount If mismount is detected early: deflate, dismount, inspect, re-lube, and re-mount the tire. Sometimes the irregular wear from mismount may be too significant to fix. At this point you can either send the tire to the trailer position or retread the casing. For a detailed discussion on mismount, please refer to the Runout and Match Mounting video from your Michelin Representative. 11⁄32" Maxi-Mini Wear 14⁄32" 30 MICHELIN X One Tire Maintenance ® ®