<!--
{
  "availability" : [
    "iOS: 8.0.0 - 26.0.0",
    "iPadOS: 8.0.0 - 26.0.0",
    "macCatalyst: 13.1.0 - 26.0.0",
    "macOS: 10.8.0 - 26.0.0",
    "tvOS: 9.0.0 - 26.0.0",
    "visionOS: 1.0.0 - 26.0.0",
    "watchOS: 3.0.0 - 26.0.0"
  ],
  "documentType" : "symbol",
  "framework" : "SceneKit",
  "identifier" : "/documentation/SceneKit/SCNPhysicsVehicleWheel/suspensionDamping",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "SceneKit"
    ],
    "preciseIdentifier" : "c:objc(cs)SCNPhysicsVehicleWheel(py)suspensionDamping"
  },
  "title" : "suspensionDamping"
}
-->

# suspensionDamping

The damping ratio that limits oscillation in the vehicle’s suspension.

```
var suspensionDamping: CGFloat { get set }
```

## Discussion

*Damping ratio* measures the tendency of the suspension to oscillate after a shock—in other words, for the vehicle to bounce up and down after running over a bump. The default damping ratio of `2.3` causes the wheel to return to its neutral position quickly after a shock. Values lower than `1.0` result in more oscillation.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)