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# steeringAxis

The direction of the axis that the wheel pivots around to steer the vehicle.

```
var steeringAxis: SCNVector3 { get set }
```

## Discussion

This vector is expressed in the coordinate space of the node containing the vehicle’s chassis. The default steering axis is `{0.0, -1.0, 0.0}`.

When you steer a wheel using the vehicle’s [`setSteeringAngle(_:forWheelAt:)`](/documentation/SceneKit/SCNPhysicsVehicle/setSteeringAngle(_:forWheelAt:)) method, the wheel pivots relative to this axis. For example, you can implement a vehicle whose rear wheels steer opposite its front wheels by reversing this vector’s direction for the rear wheels and then applying the same steering angle to all wheels.

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