Laboratory wear test procedures for automobile tires are described, as are the influences of alignments such as camber angle and toe angle. Ply‐steer and conicity were considered in determining slip angles in straight‐ahead rolling on a drum. Wear patterns produced by different alignment configurations simulated the range of patterns observed in road tests. This, together with good wear rate comparisons, supports our belief that road‐test conditions are sufficiently reproducible in the laboratory to yield valid wear test results.

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