What Causes Inner Edge Wear on Rear Tires?
2 Answers
The causes of inner edge wear on rear tires are as follows: 1. If both edges of a tire show regular and roughly equal severe wear (excluding leaf spring issues), it is caused by insufficient tire pressure: Check and replenish tire pressure. 2. If all tires exhibit regular wear on one side edge, this indicates damaged thrust rod bushings: Replace with qualified tires promptly. 3. Poor road conditions where the tire tread pattern is unsuitable for specific surfaces; improper user maintenance, mixed tire installation, or untimely rotation: Replace bushings, adjust wheelbase, and ensure bushings are replaced periodically or based on mileage.
I've got plenty of experience with inner rear tire wear. Take Old Zhang's delivery Wuling Hongguang for example - the inner edges of its tires were nearly bald. It's actually caused by suspension issues, particularly excessive negative camber or incorrect toe angle. You see, worn suspension bushings on rear control arms or deformed trailing arms can make the wheels toe-in. Overloading is the quickest way to bend the rear axle, causing the tires to tilt inward and wear on the inner side. Vehicles frequently driven on rough roads need special attention as their suspension bushings wear out much faster. Last time I repaired Old Zhang's van, we replaced three bushings and did a wheel alignment - now after six months the tread still looks perfect. Early detection and repair are crucial, otherwise the cost of replacing tires could exceed the repair expenses.
