Tandem skew, or scrub angle, occurs when tandem axles are not parallel to one another. Non-parallel axles cause all the axles to work against each other. The steer axle must be turned to compensate ...

Steer axles are least susceptible to alignment related irregular wear. Tandem axles should be parallel to each other within 1/8 inch and all axles should be perpendicular to the chassis centreline ...