The principle behind CSR is simple: A light stainless steel ring (1) with flexible support (2) is mounted with a standard tire on a standard rim.
CSR has been developed especially for standard rims and standard tires with higher side walls and larger profiles.
The tire manufacturer Continental AG has been awarded the "Stahl-Innovationspreis 2006" in the Steel Products category. The prize honored the ContiSupportRing runflat system.
Because of the good riding comfort CSR afford, drivers hardly notice any pressure loss in the event of a flat; to increase both safety in the event of a flat and performance during normal driving, the CSR system is supplied only together with an inflation warning system – either TPMS (Tire Pressure Monitoring System) or DDS (Deflation Detection System), both of which were likewise developed by Continental.
These warning systems alert the driver when a drop in inflation pressure requires investigation via a display on the instrument panel. ContiSupportRing as well as the inflation warning systems TPMS/DDS are exclusively installed in original equipment.