The traction between the wheel and any surface in contact with it.
- iOS 8.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 3.0+
The default value of this property is
1. Lower values result in better traction, and higher values make the wheel more likely to slip (causing it to spin freely instead of moving the vehicle).