
SETBACK
Setback is the amount by which one front wheel is further back from the front of the vehicle than the other. It is also the angle
formed by a line perpendicular to the axle centerline with respect to the vehicle's centerline.
Setback is specified in degrees, and should generally be less than half a degree. If the left wheel is further back than the right,
setback is negative. If the right wheel is further back than the left, setback is positive.
Setback is measured with both wheels straight ahead, and is used as a diagnostic angle along with caster to identify chassis
misalignment or collision damage. The presence of setback can also cause differences in toe-out on turn angle readings
side-to-side.
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