What Causes Uneven Wear on Truck Rear Tires?
2 Answers
Here are the reasons for uneven wear on truck rear tires: 1. Excessive contact force between the tire sidewall and the ground, irregular tire rotation, and inaccurate four-wheel alignment. 2. Incorrect toe adjustment, leading to inner tire wear. 3. Steering gear failure. 4. Uneven frame. 5. Significant differences in tire pressure among tires, causing central tread wear. Here are situations that require four-wheel alignment: 1. Vehicle pulling to one side: When driving straight, the steering wheel is off-center, or you experience heavy steering, shaking, or failure to return to center, a four-wheel alignment is needed. 2. Abnormal tire wear: Unusual wear patterns such as scalloped wear, block wear, or uneven wear on one side indicate the need for four-wheel alignment. 3. Floating sensation: If you feel the vehicle floating, bouncing, or swaying while driving, a four-wheel alignment is required. 4. After repairs or replacements: If the suspension or steering system has been repaired or replaced, a four-wheel alignment should also be performed.
Last time, our team's veteran driver Lao Zhang encountered the same issue - the inner side of the rear tires was worn unevenly like dog bites. There are several common causes for truck tire wear: incorrect wheel alignment, such as toe-in deviation; if the rear axle leaf springs deform or sag, the entire frame runs crooked; loose wheel hub bearings causing wheel wobble; and overloading during transport is particularly harmful - like when we long-haul drivers overload by two tons for convenience, the tires inevitably suffer. The most troublesome is wheel rim deformation - refurbished rims from secondary markets usually develop problems within three months. Last month during maintenance, the mechanic measured the wheelbase with a tape and found a half-centimeter difference between sides - turns out the axle got bent from rough road impacts.
