Toe-in

Introduction:
                The long tread wear potential offered by modern radial line haul truck tires can be reduced by the misalignment of tractor and/or trailer wheels and axles. Extensive research has demonstrated that total vehicle alignment programs can pay dividends in extended tire wear and improved fuel economy.

               

Toe:

There has been increased attention to proper truck alignment procedures during the past few years, and for good reason. Current radial steer axle tires provide a much slower rate of wear than earlier generation radial or bias ply tires. This also means that they may reflect the adverse effect of improper alignment that was unseen on faster wearing tires.

 

Toe is defined as the difference in distance apart, at the front and at the rear, of the steering-axle tires as seen in a top view of the truck.

 

Toe-in:

Toe-in exists when the tires are closer together in the front than in the rear and excessive toe-in results in feather wear.

 

 

 

• Toe-out can be found in at least one of five main forms; static toe out, toe out on turns "Ackerman steering", toe out due to bump steer, steering arm toe out, and toe out due to slip angles.

• The most commonly known form of toe-out is "static" toe-out. This is where the tie rods are adjusted such that the front edges of the tires to be farther apart than the rear edges of the tires when viewing the car from above.