Some tyres, known as Self Supporting Run Flat Tyres, are designed to provide a limited run on period following a puncture.
Tyres offering various levels of run flat performance are available. Tyres identified by the letter "RF" in the size marking are able to run uninflated for at least 50 miles (80km) at a maximum speed of 50 mph (80 km/h). To accompany the use of run flat tyres it is essential that the vehicle is equipped with an operational Tyre Pressure Monitoring System (TPMS)
The choice of tyres can have considerable bearing on a vehicle's handling. It is preferable to have tyres with the same tread pattern on each axle and ideally on all wheel positions. It is strongly recommended not to mix conventional ad run flat tyres on the same vehicle. Particular care is required if retro-fitting run flat tyres as other modifications to the vehicle may be necessary.