Alignment / Toe
To get the best performance from properly inflated, properly balanced and properly mounted Yokohama truck/bus tires, it's important that the vehicle is properly aligned. Irregular tire wear and improper handling are conditions that immediately point to a possible alignment problem. Alignment checks should be made under the following conditions:
- In the first few thousand miles of vehicle operation.
- When irregular tire wear is present.
- When handling the vehicle becomes difficult.
- After repair or replacement of parts affecting alignment.
Three main alignment settings determine whether or not truck/bus tires receive normal or irregular treadwear: toe, tracking and camber.
Toe, the most critical alignment setting for tire wear, refers to the difference in distance between the front of the tires on the same axle and the rear of those same tires.
Toe-in occurs when the distance between the front of the tires is less than the distance between the rear of the tires. Tires showing signs of irregular treadwear along the outer shoulder are experiencing toe-in.
When the distance between the front of the tires is greater than that of the rear of the tires, toe-out occurs, wearing away the inside shoulder of the tires. Toe-in and toe-out are conditions of front wheel misalignment due to the interrelated parts of the steering assembly. In any case, tire wear will always occur on the leading edge of a tire unless an ideal zero toe condition is present.