if your thinking about fitting the new run flat tyres to your vehicle, note they should only be fitted to vehicles that have a tyre pressure monitoring system fitted, report below.
"Fitting run-flats to a car not designed for them is inadvisable at best, according to the Tyre Industry Council (TIC).
A car's suspension is specifically tuned for SST run-flat tyres for maximum safety, performance, handling and ride quality. SST Run-flat tyres must only be fitted in conjunction with a tyre pressure monitoring system to ensure that a tyre deflation is communicated to the driver at the earliest possible moment. Failure to do so could result in a tyre being run in a deflated condition for longer than the recommended period and the driver left in ignorance of a tyre's condition.
Retrofitting of SST run-flat tyres may also compromise the ride characteristics of the vehicle to which they have been fitted because few older vehicles have been designed with run-flat fitment in mind.
An example pointed out to the TIC recently involved the fitment of a set of run-flat tyres to a 10 year old vehicle not fitted with a tyre pressure monitoring system. The car suffered a puncture and the driver was unaware of the deflated tyre, which was run in this state for some time, and the car failed its MOT because of damage to the tyre. This could have had serious legal implications if the vehicle had been involved in an accident.
All major tyre manufacturers producing SST run-flat tyres, along with all major tyre retailers, recommend against fitting run-flat tyres to vehicles not originally designed with this type of tyre in mind.
Self supporting run-flat tyres must never be mixed with standard tyres on any vehicle."