At a constant highway speed on a typical straight road, lead/pull is the amount of effort required at the steering wheel to maintain the vehicle's straight path.
Note: Vehicles will tend to lead/pull in the direction of the road slope as part of normal operation.
Lead/pull is usually caused by the following factors:
| • | Variability in tire construction |
| • | Wheel alignment (front cross caster and camber) |
| • | Unbalanced steering gear |
| • | Electronic power steering (EPS) steering position and torque sensors not calibrated correctly, if equipped |
