Emergency running system with integrated support ring
(In the future, primarily on heavy safety vehicles)
The support ring is made of a high-strength resilient plastic and is fitted on the disc wheel inside the tire. The support ring can only be removed using special tools which have been specially approved by BMW. It can only be removed after destroying the tire.
Emergency running systems with integrated support ring are used in particular on heavy safety vehicles. They allow the vehicle to be driven away from a potential danger without dropping speed even if the tires have suffered a complete loss of pressure (flight situation).
It is possible as an option to have the tire pressure monitored by an RD. system. The RD. is installed by pressing the components into the support ring before it is fitted.