What Causes Inner Tire Wear on Rear Wheels?
1 Answers
Inner tire wear on both front and rear wheels may be caused by issues such as incorrect toe-in or insufficient camber angle of the steering tires, which are related to wheel alignment problems. It could also be due to wheel imbalance issues, such as not performing balancing after tire repair or replacement. To address inner tire wear, specific analysis of the problem is required. Here are the relevant explanations: Insufficient Toe-in: The toe-in of the steering wheels is primarily set to compensate for the adverse effects of wheel side slip caused by steering and the influence of tangential reaction forces from the road surface. If the toe-in value is too small, it can cause severe wear on the inner side of the tire tread, presenting as sawtooth-shaped wear from the inner to the outer side of the tread, and may also make steering feel heavy during driving. Insufficient Camber Angle: The camber angle refers to the inward tilt of the front wheels, which helps prevent the vehicle from veering off course and allows the vehicle to self-correct without steering wheel input. When the camber angle is too small, it can lead to inner tire wear. Additionally, during straight-line driving, it reduces the contact area between the tire and the road, decreasing longitudinal grip and thus weakening acceleration and braking performance. Both toe-in and camber angle are wheel alignment issues that can be resolved through a wheel alignment service. Wheel Balancing: Due to manufacturing variations, tire mass distribution is not entirely uniform. When the vehicle is driven at high speeds, the high-speed rotation of the tires amplifies any mass imbalance, making the vehicle prone to veering. Therefore, balancing weights are added to the tires to achieve balance. Balancing weights are placed on both the inner and outer sides of the tire. If the vehicle frequently travels on rough roads, causing the outer balancing weights to fall off, it can result in inner tire wear. In such cases, wheel balancing is required to address the wear issue.
