You will be able to check whether your current tyres are Run Flat tyres by checking the sidewall.
Unfortunately there is no industry standard code to represent this and different manufacturers use different symbols or letters. These are as follows:
• Continental Run Flat Tyres – SSR
• Dunlop Run Flat Tyres – DSST or ROF
• Goodyear Run Flat Tyres – ROF or EMT
• Bridgestone Run Flat Tyres - ROF or RFT or RSC
• Michelin Run Flat Tyres – ZP
• Hankook Run Flat Tyres – tyres will be marked with HRS or have B at the end of the product number (e.g. K115B)
• Pirelli Run Flat Tyres – RSC
• Yokohama Run Flat Tyres – ZPS