Tyre type by manufacturer
If you have matching tyres on your car it is not necessary to replace them with exactly the same type, but it does look nicer. You should be able to see the type name somewhere on the tyre wall.
Size of Tyre
What the numbers on a tyre wall mean.
Width/Depth of the tyre is indicated like 205/55
The tyre radius is shown as R15
The tyre speed rating is indicated by 91W for example
Type of Run Flat Tyres
Tyre Run Flat Identification Bridgestone use the acronym RFT (run flat tyre) Dunlop use the acronym DSST (Dunlop Self Support Technology) Firestone use the acronym RFT (run flat tyre) Goodyear use the acronym EMT (extended Mobility Technology) Michelin use the acronym ZP (zero pressure) Pirelli use the acronym RFT (run flat tech) Yokohama use the accronym RFT (run flat technology)