Irrespective of the cause of failure, you can still maintain complete control of your vehicle. Prevents the tyre from leaving or damaging the rim when there’s sudden air loss like a puncture or blowout. The rim grips the tyre, which allows for continued steering, braking and cornering with the tyre rubber between the rim and the surface of the road. You can drive to safety at a reasonable speed, where you can change your tyre without stopping somewhere dangerous.