Toe-in

The toe measurement is the difference in the distance between the front of the tires and the back of the tyres. It is measured in degrees and minutes and is usually set close to zero which means that the wheels are parallel with each other. Toe-in means that the fronts of the tyres are closer to each other than the rears. Toe-out is just the opposite. An incorrect toe-in will cause rapid tyre wear to both tyres equally.

Four-Wheel Alignments

There are two main types of 4-wheel alignments. In each case, the technician will place an instrument on all four wheels. In the first type the rear toe and tracking is checked, but all adjustments are made at the front wheels. This is done on vehicles that do not have adjustments on the rear. The second type is a full 4-wheel alignment where the adjustments are first made to toe up the rear alignment, then the front is adjusted. A full 4-wheel alignment will cost more than the other type because there is more work involved.